CN220207823U

CN220207823U - High-voltage power supply monitoring PCB of laser equipment

Info

Publication number: CN220207823U
Application number: CN202321458383.8U
Authority: CN
Inventors: 解洪超
Original assignee: Jinan Bodor Laser Co Ltd
Current assignee: Jinan Bodor Laser Co Ltd
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-12-19
Anticipated expiration: 2033-06-07

Abstract

The utility model belongs to the technical field of electric high-low voltage power supply monitoring signal measurement, and particularly provides a high-low voltage power supply monitoring PCB of laser equipment, which comprises a processing module and a voltage conversion module; the processing module is connected with an AD sampling module and a communication module used for being connected with an external electric energy meter; the input end of the voltage conversion module is connected to a direct current power supply outside the PCB board card, or the input end of the voltage conversion module is connected with a direct current power supply arranged on the PCB board card; the output end of the voltage conversion module is respectively connected with the processing module and the communication module; the input end of the AD sampling module is connected to a switching power supply outside the PCB board card. And the mode of high voltage, current and voltage power consumption of the laser equipment is optimized, and dangerous operation is reduced.

Description

High-voltage power supply monitoring PCB of laser equipment

Technical Field

The utility model relates to the technical field of electric high-low voltage power supply monitoring signal measurement, in particular to a high-low voltage power supply monitoring PCB of laser equipment.

Background

With the advent of the intelligent age, equipment is required to be more and more intelligent, and equipment maintenance, power consumption and power quality can be checked at any time and any place. At present, when the power consumption condition of a high-voltage power supply of laser cutting equipment is counted, a total electric energy meter of a customer is generally used, but the electric energy meter is difficult to view at any time due to the fact that the installation position of the electric energy meter is high. In addition, the low-voltage switching power supply generally needs to be measured on site by path by using a universal meter, which is time-consuming and labor-consuming and also has the risk of safety accidents caused by improper operation.

Aiming at the defects in the prior art, it is very necessary to provide a high-low voltage power supply monitoring PCB board of a laser device.

Disclosure of Invention

The method aims at the situation that when the power consumption of the high-voltage power supply of the laser cutting equipment is counted at present, the total electric energy meter of a customer is generally roughly used, the position of the electric energy meter is high, and the situation that the customer is difficult to check at any time is realized. The utility model provides a high-low voltage power supply monitoring PCB of a laser device, which generally adopts a field multimeter to measure by path, wastes time and labor, and also has the problem of safety accidents caused by improper operation.

The technical scheme of the utility model provides a high-low voltage power supply monitoring PCB of laser equipment, which comprises a processing module and a voltage conversion module;

the processing module is connected with an AD sampling module and a communication module used for being connected with an external electric energy meter;

the input end of the voltage conversion module is connected to a direct current power supply outside the PCB board card, or the input end of the voltage conversion module is connected with a direct current power supply arranged on the PCB board card;

the output end of the voltage conversion module is respectively connected with the processing module and the communication module;

the input end of the AD sampling module is connected to a switching power supply outside the PCB board card.

As the preferable choice of the utility model, the PCB board also comprises a power supply filtering module, and the direct current power supply is connected with the voltage conversion module through the power supply filtering module.

As a preferred aspect of the present utility model, the power supply filtering module includes a common mode inductor L1, a first end of the common mode inductor L1 is connected to a positive output end of the dc power supply, a second end of the common mode inductor L1 is a negative output end of the main current power supply, and the first end of the common mode inductor L1 is grounded through a capacitor C1, a capacitor C0, a resistor R0 and a transient suppression diode TVS0 connected in parallel; the third end of the common-mode inductor is grounded, the fourth end of the common-mode inductor L1 is connected with the drain electrode of the MOS tube, and the source electrode of the MOS tube is connected to the voltage conversion module through an inductor L2; the grid of MOS pipe passes through resistance R1 ground connection, and the grid of MOS pipe passes through zener diode and is connected with the source of MOS pipe, and the grid of MOS pipe still passes through resistance R2 and is connected with the MOS pipe source, and inductance L2 one end is through parallelly connected electric capacity C3 and electric capacity C4 ground connection, and inductance L2's the other end passes through electric capacity C5 ground connection.

As a preferred aspect of the present utility model, the power conversion module includes a first power module and a second power module;

the first power supply module comprises a DC/DC converter, the output end of the power supply filter module is connected with the power supply end of the DC/DC converter, the power supply end of the DC/DC converter is grounded through a capacitor C6, a capacitor C7 and a capacitor C8 which are connected in parallel, the switch end of the DC/DC converter is grounded through a resistor R3, and the output end of the DC/DC converter outputs a first power supply through an inductor L3;

one end of the inductor L3 is grounded through the zener diode D3, and the other end of the inductor L3 is grounded through the capacitor C9, the diode D2, the capacitor C10 and the capacitor C11 which are connected in parallel.

The second power supply module comprises a voltage stabilizing chip, the output end of the voltage stabilizing chip is connected with the first power supply, the output end of the voltage stabilizing chip outputs the second power supply, the input end of the voltage stabilizing chip is grounded through a capacitor C38, and the output end of the voltage stabilizing chip is grounded through a capacitor C39.

As a preferred aspect of the present utility model, the AD sampling module includes a common-mode inductor L5 and a switching power supply connector for connection with an external switching power supply, a first end of the common-mode inductor L5 being connected to a positive end of the switching power supply connector through an inductor L4; the second end of the common mode inductor L5 is connected to the negative end of the switch power supply connector, one end of the inductor L4 is connected to the negative end of the switch power supply connector through a capacitor C13, a capacitor C12, a capacitor C30 and a transient suppression diode TVS1 which are connected in parallel, the other end of the inductor L4 is connected to the negative end of the switch power supply connector through a capacitor C14 and a capacitor C15 which are connected in parallel, the third end of the common mode inductor L5 is grounded, the fourth end of the common mode inductor L5 is connected to the processing module through a resistor R4, the fourth end of the common mode inductor L5 is grounded through a capacitor C16 and a capacitor C17 which are connected in parallel, and the connecting end of the resistor R4 and the processing module is grounded through a resistor R5 and a capacitor C27 which are connected in parallel.

The switching power supply outputs two paths of power supplies, and one path of power supply is connected with one path of AD sampling module;

the AD sampling module of the other path comprises a common-mode inductor L7 and another path of switching power supply connector used for being connected with an external switching power supply, and the first end of the common-mode inductor L7 is connected to the positive end of the switching power supply connector through an inductor L6; the second end of the common mode inductance L7 is connected to the negative end of the switch power supply connector, one end of the inductance L6 is connected to the negative end of the switch power supply connector through a capacitor C19, a capacitor C18, a capacitor C31 and a transient suppression diode TVS2 which are connected in parallel, the other end of the inductance L6 is connected to the negative end of the switch power supply connector through a capacitor C20 and a capacitor C21 which are connected in parallel, the third end of the common mode inductance L7 is grounded, the fourth end of the common mode inductance L7 is connected to the processing module through a resistor R6, the fourth end of the common mode inductance L7 is grounded through a capacitor C22 and a capacitor C23 which are connected in parallel, and the connection end of the resistor R6 and the processing module is also grounded through a resistor R7 and a capacitor C28 which are connected in parallel.

As a preferred aspect of the present utility model, the power conversion module further includes a third power module, where the third power module includes a common-mode inductor L8, a first end of the common-mode inductor L8 is connected to the first power supply, a second end of the common-mode inductor L8 is grounded, and the first end of the common-mode inductor L8 is further connected to the second end of the common-mode inductor L8 through a capacitor C32; the third end of the common mode inductor L8 is grounded, the fourth end of the common mode inductor L8 outputs a third power supply, and the fourth end of the common mode inductor L8 is also connected with the third end of the common mode inductor L8 through a capacitor C33.

As an optimization of the utility model, the communication module comprises an RS485 communication module and an electric energy meter signal connector which is connected with the RS485 communication module and is used for being connected to an external electric energy meter;

the RS485 communication module comprises a receiving and transmitting chip and a digital isolator; the transceiver chip is connected to the electric energy meter signal connector; the transceiver chip is connected to the processing module through a digital isolator. The digital isolator is connected with the first power supply and the third power supply respectively.

As the optimization of the utility model, the RS485 communication module is a double-path RS485 communication module, and the circuit structures of the two paths of RS485 communication modules are the same; the AD sampling module is a two-way AD sampling module, and the circuit structures of the two-way AD sampling module are the same.

As the preferable mode of the utility model, the communication module further comprises a Bluetooth module, wherein the receiving end of the Bluetooth module is connected with the processing module through a resistor R14, the transmitting end of the Bluetooth module is connected with the processing module, and the power end of the Bluetooth module is connected with the second power supply.

As the optimization of the utility model, the PCB comprises a board body, and the voltage conversion module, the processing module, the communication module and the power supply filtering module are all arranged on the board body;

the back of the board card body is arranged on the DIN guide rail through the mounting frame.

The communication module is connected with the electric energy meter through the electric energy meter signal connector, the voltage, the current and the power of the electric energy meter are converted into RS485, the RS485 is input into the processing module for processing, meanwhile, the data sampling is carried out on the voltage output by the core power supply of the machine tool, namely the switch power supply of the machine tool, and the voltage is uniformly processed by the processing module and is output to an upper computer or a mobile phone terminal outside the board card body in a Bluetooth mode through the Bluetooth module or in an RS485 mode through the RS485 communication module for real-time display. The high-low voltage power supply monitoring PCB is mainly applied to equipment switching power supply direct-current voltage acquisition and 380V complete machine voltage and current through connection with an electric energy meter, and the power is acquired and acquired information is processed and then uploaded to an external upper computer or mobile phone.

From the above technical scheme, the utility model has the following advantages: and the mode of high voltage, current and voltage power consumption of the laser equipment is optimized, and dangerous operation is reduced. The detection signal is output to the outside by using the high-low voltage power supply monitoring board, so that the condition of the high-low voltage power supply can be checked in real time, and the safety and the reliability are high.

In addition, the utility model has reliable design principle, simple structure and very wide application prospect.

It can be seen that the present utility model has outstanding substantial features and significant advances over the prior art, as well as its practical advantages.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic connection block diagram of a PCB board according to an embodiment of the present utility model.

Fig. 2 is a circuit connection diagram of a power filter module.

Fig. 3 is a circuit connection diagram of a 5V power module.

Fig. 4 is a 3.3V power module circuit connection diagram.

Fig. 5 is a circuit connection diagram of the two-way AD sampling module.

Fig. 6 is a third power module circuit connection diagram.

Fig. 7 is a circuit connection diagram of the bluetooth module.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As shown in fig. 1, the embodiment of the utility model provides a high-low voltage power supply monitoring PCB board of a laser device, which includes a processing module and a voltage conversion module;

In the embodiment of the utility model, the PCB board card can be provided with a direct current power supply for supplying power to the board card; the power supply can also be powered by a switch power supply outside the PCB board, and the power supply required to be powered in the embodiment is set to output 12V.

The method comprises the steps that an AD sampling module is used for collecting signals of an external switching power supply, wherein the switching power supply is a low-voltage power supply of equipment, and the AD sampling module is used for collecting and monitoring the low-voltage power supply; the communication module is connected with an external electric energy meter and used for acquiring acquisition information of the electric energy meter, the acquisition information is transmitted to the processing module, the PCB board transmits acquired signals to the display terminal outside the PCB board through the processing module for display, and the display terminal can be a PC or a mobile phone.

In some embodiments, the PCB further includes a power filter module, and the dc power supply is connected to the voltage conversion module through the power filter module.

If the direct current power supply is directly used, the filtering can be omitted to supply power to the PCB, and if the direct current power supply is a switching power supply in the cabinet body, the filtering treatment is required to be carried out on the power supply part because the noise of the low voltage power supply in the equipment cabinet is large, and the filtering treatment is required to be carried out on the high voltage pulse voltage difference mode and the common mode interference of the concentrated noise interference as follows.

IN some embodiments, as shown IN fig. 2, the power filtering module includes a common-mode inductor L1, where a first end of the common-mode inductor L1 is connected to a positive output end of the dc power supply, IN this embodiment, 12V IN is used, and a second end of the common-mode inductor L1 is a negative output end of the dc power supply, and the first end of the common-mode inductor L1 is grounded through a capacitor C1, a capacitor C0, a resistor R0, and a transient suppression diode TVS0 connected IN parallel; the third end of the common-mode inductor is grounded, the fourth end of the common-mode inductor L1 is connected with the drain electrode of the MOS tube Q1, and the source electrode of the MOS tube Q1 is connected to the voltage conversion module through the output V-IN of the inductor L2; the grid of the MOS tube Q1 is grounded through a resistor R1, the grid of the MOS tube Q1 is connected with the source electrode of the MOS tube Q1 through a voltage stabilizing diode, the grid of the MOS tube Q1 is also connected with the source electrode of the MOS tube Q1 through a resistor R2, one end of an inductor L2 is grounded through a capacitor C3 and a capacitor C4 which are connected in parallel, and the other end of the inductor L2 is grounded through a capacitor C5.

TVS0 represents a transient suppression diode, and is specially used for protecting sensitive electronic equipment in circuit application from transient voltage damage caused by lightning strokes and other transient voltage events, a capacitor C0 is used for buffering and stabilizing current and voltage, capacitors C1 and C2 are used for filtering high-frequency signal interference, L1 eliminates common-mode current, L2C 4 and C5 form LC filter circuits Q1, C3 ZD0, R1 and R2, and voltage modulation and power supply filtering functions are carried out on the LC filter circuits Q1, C3 ZD0 and R1 and R2. The ground in this embodiment refers to a protective ground for ground.

In some embodiments, the power conversion module includes a first power module and a second power module; the first power supply module is a 5V power supply module, and the second power supply module is a 3.3V power supply module;

as shown in fig. 3, the 5V power module includes a DC/DC converter U01, an output end of the power filter module is connected to a power end VIN of the DC/DC converter U01, the power end of the DC/DC converter U01 is further grounded through a capacitor C6, a capacitor C7 and a capacitor C8 connected in parallel, a switch end of the DC/DC converter U01 is grounded through a resistor R3, and an output end of the DC/DC converter U01 outputs a first power d+5 through an inductor L3;

As shown in fig. 4, the 3.3V power module includes a voltage stabilizing chip U02, an output end of the voltage stabilizing chip U02 is connected to the first power source d+5, an output end of the voltage stabilizing chip U02 outputs the second power source d+3.3, an input end of the voltage stabilizing chip U02 is further grounded through a capacitor C38, and an output end of the voltage stabilizing chip U02 is further grounded through a capacitor C39.

The grounding in this embodiment is also referred to as a protection ground, and the 5V power module is used to supply power to a part of components, and the power supply is filtered and then adopts an XL1509-12E1 switching current buck DC-DC converter to provide working power to the processing module.

And the 3.3V power supply module converts 5V into 3.3V to use LDO for supplying power to the Bluetooth module.

In some embodiments, the processing module is a CPU microprocessor circuit module, and the model number of the CPU microprocessor is STM8S105K4, which is respectively connected with the two-way AD sampling circuit module and the two-way RS485 communication module, and is used for extracting digital voltage parameters, current parameters and power parameters stored in the metering chip of the electric energy meter.

In some embodiments, the switching power supply outputs two power supplies, and each power supply is connected with one AD sampling module; as shown in fig. 5, the AD sampling module is a two-way AD sampling module, where one way of AD sampling module includes a common-mode inductor L5 and a switching power supply connector CN0 for connection with an external switching power supply, and a first end of the common-mode inductor L5 is connected to a positive end a+ of the switching power supply connector CN0 through an inductor L4; the second end of the common-mode inductor L5 is connected to the negative end A-of the switch power supply connector, one end of the inductor L4 is connected to the negative end A-of the switch power supply connector through a capacitor C13, a capacitor C12, a capacitor C30 and a transient suppression diode TVS1 which are connected in parallel, the other end of the inductor L4 is connected to the negative end A-of the switch power supply connector through a capacitor C14 and a capacitor C15 which are connected in parallel, the third end of the common-mode inductor L5 is grounded, the fourth end of the common-mode inductor L5 is connected to the A_INPUT of the processing module through a resistor R4, and the fourth end of the common-mode inductor L5 is grounded through a resistor R5 and a capacitor C27 which are connected in parallel.

The AD sampling module of the other path comprises a common-mode inductor L7 and another path of switching power supply connector CN1, and the first end of the common-mode inductor L7 is connected to the positive end B+ of CN1 through an inductor L6; the second end of the common-mode inductor L7 is connected to the negative end B-of CN1, one end of the inductor L6 is connected to the negative end B-of CN1 through a capacitor C19, a capacitor C18, a capacitor C31 and a transient suppression diode TVS2 which are connected in parallel, the other end of the inductor L6 is connected to the negative end B-of CN1 through a capacitor C20 and a capacitor C21 which are connected in parallel, the third end of the common-mode inductor L7 is grounded, the fourth end of the common-mode inductor L7 is connected to the B_INPUT of the processing module through a resistor R6, and the fourth end of the common-mode inductor L7 is grounded through a capacitor C22 and a capacitor C23 which are connected in parallel, and the connecting end of the resistor R6 and the processing module is also grounded through a resistor R7 and a capacitor C28 which are connected in parallel.

And the two-way AD sampling module is connected with the switching power supplies 12V and 24V through a switching power supply connector (wiring terminal) to an AD sampling circuit, outputs voltages A_INPUT and B_INPUT after power supply filtering to remove noise, and is respectively connected with the CPU microprocessor for storing collected voltage signals and converting the collected voltage signals into digital voltage parameters.

In some embodiments, as shown in fig. 6, the power conversion module further includes a third power module, where the third power module includes a common-mode inductor L8, a first end of the common-mode inductor L8 is connected to the first power source d+5, a second end of the common-mode inductor L8 is grounded, and the first end of the common-mode inductor L8 is further connected to the second end of the common-mode inductor L8 through a capacitor C32; the third end of the common mode inductor L8 is grounded, the fourth end of the common mode inductor L8 outputs a third power supply D+5-485, and the fourth end of the common mode inductor L8 is also connected with the third end of the common mode inductor L8 through a capacitor C33.

In some embodiments, the communication module includes an RS485 communication module and a power meter signal connector connected to the RS485 communication module for connecting to an external power meter; the RS485 communication module is a double-path RS485 communication module, and the circuit structures of the two paths of RS485 communication modules are the same;

one path of RS485 communication module comprises a receiving and transmitting chip and a receiving and transmitting chip; the transceiver chip is connected to the electric energy meter signal connector; the transceiver chip is connected to the processing module through a digital isolator. The digital isolator is connected with the first power supply and the third power supply D+5-485 respectively.

The double-circuit RS485 communication module IS of a model SP485EEN-L/TR, IS connected with a digital signal of the strong electric energy meter, IS isolated from an optocoupler (of a model CA-IS3721 HS) through a digital isolator (of a model EL 357), IS connected with the processing module, IS converted into a uniform digital format with a low-voltage power supply signal, and IS uploaded to an MES cloud through the RS485 communication module or IS connected with the Bluetooth module to send out the digital signal.

In some embodiments, as shown in fig. 7, the communication module further includes a bluetooth module CN6, where a receiving end of the bluetooth module CN6 is connected to the processing module through a resistor R14, a transmitting end of the bluetooth module CN6 is connected to the processing module, and a power end of the bluetooth module is connected to the second power source d+3.3. The Bluetooth module is HC02, is connected with the microprocessor and used as a slave station for receiving information of the microprocessor, and the HC02 is used as the slave station for receiving and sending data from the serial port.

It should be noted that fig. 2 is a power filtering module, and provides power for each module. Fig. 3 is a 5V power module, which is mainly used for modulating voltage and current to supply power to the microprocessor and the 485 communication module. Fig. 4 is a 3.3V power module, which is mainly used for supplying power to the bluetooth module. The processing module is used for processing the sampling data of the circuit and processing two 485 signals, and sending out Bluetooth module data. Fig. 5 is a circuit connection of the two-way AD sampling module, mainly through the collection of two-way switching power supply voltages in the laser device, and through the conversion of the CPU microprocessor into digital signals for emission. The RS485 communication module is used for collecting the voltage current power of the strong electric energy meter and transmitting the voltage current power to the processing module through a digital signal. The other path of RS485 communication module is used for connecting an external upper computer and is used for being remotely read by an MES system. Fig. 7 is a schematic diagram of a bluetooth module, and the digital signals collected by strong current and the digital signals collected by weak current are processed by micro-processing and then sent to the bluetooth module to provide wireless receiving display of a mobile phone terminal.

In some embodiments, the PCB board includes a board card body, and the voltage conversion module, the processing module, the communication module, and the power filter module are all disposed on the board card body;

Although the present utility model has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present utility model is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present utility model by those skilled in the art without departing from the spirit and scope of the present utility model, and it is intended that all such modifications and substitutions be within the scope of the present utility model/be within the scope of the present utility model as defined by the appended claims. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. The high-low voltage power supply monitoring PCB of the laser equipment is characterized by comprising a processing module and a voltage conversion module;

2. The laser device high-low voltage power supply monitoring PCB of claim 1, further comprising a power filter module, wherein the dc power supply is connected to the voltage conversion module through the power filter module.

3. The high-low voltage power supply monitoring PCB of the laser device according to claim 2, wherein the power supply filtering module includes a common mode inductance L1, a first end of the common mode inductance L1 is connected to a positive output end of the dc power supply, a second end of the common mode inductance L1 is connected to a negative output end of the dc power supply, and the first end of the common mode inductance L1 is grounded through a capacitor C1, a capacitor C0, a resistor R0 and a transient suppression diode TVS0 connected in parallel; the third end of the common-mode inductor is grounded, the fourth end of the common-mode inductor L1 is connected with the drain electrode of the MOS tube, and the source electrode of the MOS tube is connected to the voltage conversion module through an inductor L2; the grid of MOS pipe passes through resistance R1 ground connection, and the grid of MOS pipe passes through zener diode and is connected with the source of MOS pipe, and the grid of MOS pipe still passes through resistance R2 and is connected with the MOS pipe source, and inductance L2 one end is through parallelly connected electric capacity C3 and electric capacity C4 ground connection, and inductance L2's the other end passes through electric capacity C5 ground connection.

4. The laser device high and low voltage power supply monitoring PCB of claim 1, 2 or 3, wherein the power conversion module comprises a first power module and a second power module;

one end of the inductor L3 is grounded through the zener diode D3, and the other end of the inductor L3 is grounded through the capacitor C9, the diode D2, the capacitor C10 and the capacitor C11 which are connected in parallel;

5. The high-low voltage power supply monitoring PCB of the laser device according to claim 4, wherein the AD sampling module comprises a common-mode inductor L5 and a switching power supply connector for connecting with an external switching power supply, a first end of the common-mode inductor L5 is connected to a positive end of the switching power supply connector through the inductor L4; the second end of the common mode inductor L5 is connected to the negative end of the switch power supply connector, one end of the inductor L4 is connected to the negative end of the switch power supply connector through a capacitor C13, a capacitor C12, a capacitor C30 and a transient suppression diode TVS1 which are connected in parallel, the other end of the inductor L4 is connected to the negative end of the switch power supply connector through a capacitor C14 and a capacitor C15 which are connected in parallel, the third end of the common mode inductor L5 is grounded, the fourth end of the common mode inductor L5 is connected to the processing module through a resistor R4, the fourth end of the common mode inductor L5 is grounded through a capacitor C16 and a capacitor C17 which are connected in parallel, and the connecting end of the resistor R4 and the processing module is grounded through a resistor R5 and a capacitor C27 which are connected in parallel.

6. The laser device high and low voltage power supply monitoring PCB of claim 5, wherein the power conversion module further comprises a third power supply module, the third power supply module comprises a common mode inductor L8, a first end of the common mode inductor L8 is connected to the first power supply, a second end of the common mode inductor L8 is grounded, and the first end of the common mode inductor L8 is further connected to the second end of the common mode inductor L8 through a capacitor C32; the third end of the common mode inductor L8 is grounded, the fourth end of the common mode inductor L8 outputs a third power supply, and the fourth end of the common mode inductor L8 is also connected with the third end of the common mode inductor L8 through a capacitor C33.

7. The laser device high and low voltage power supply monitoring PCB of claim 6, wherein the communication module comprises an RS485 communication module and an electric energy meter signal connector connected to the RS485 communication module for connecting to an external electric energy meter;

the RS485 communication module comprises a receiving and transmitting chip and a digital isolator; the transceiver chip is connected to the electric energy meter signal connector; the transceiver chip is connected to the processing module through a digital isolator.

8. The high-low voltage power supply monitoring PCB of the laser equipment according to claim 7, wherein the RS485 communication module is a two-way RS485 communication module, and the circuit structures of the two-way RS485 communication module are identical; the AD sampling module is a two-way AD sampling module, and the circuit structures of the two-way AD sampling module are the same.

9. The laser equipment high-low voltage power supply monitoring PCB according to claim 4, wherein the communication module further comprises a Bluetooth module, the receiving end of the Bluetooth module is connected with the processing module through a resistor R14, the transmitting end of the Bluetooth module is connected with the processing module, and the power end of the Bluetooth module is connected with the second power supply.

10. The laser equipment high-low voltage power supply monitoring PCB according to claim 2, wherein the PCB comprises a board card body, and the voltage conversion module, the processing module, the communication module and the power supply filtering module are all arranged on the board card body;