WO2024244523A1 - Apparatus for protecting eyes of welder in internet of things-based welding system - Google Patents

Abstract

An apparatus for protecting the eyes of a welder in an Internet of Things-based welding system. A wireless signal receiver (1) and an optical element (3) connected to the wireless signal receiver are mounted on a protective mask; a wireless signal transmitter (2) and a command switch (6) are mounted on a welding torch (5); the command switch is provided with a front micro switch (8) used to activate the wireless signal transmitter, and a rear micro switch (9) used to activate a start command of a process flow; after the command switch is pressed, the front micro switch is first closed to activate the wireless signal transmitter to send a wireless signal, and after receiving the wireless signal, the wireless signal receiver on the protective mask controls a circuit connected thereto to send an electrical signal to the optical element, so that the optical element changes the light transmittance thereof under the action of the electrical signal; the rear micro switch in the command switch is closed after the front micro switch, and the welding torch is driven to start setting a welding process flow. The present apparatus causes the optical element to become darker before an arc is generated, to protect the eyes of a welder.

Description

A device for protecting welder's eyes based on the Internet of Things welding system Technical Field

The present invention relates to the field of welding and cutting, and more specifically, to a device for protecting welder's eyes based on an Internet of Things welding system.

Background Art

Strong luminescence will be generated during welding and cutting operations. These lights are not only extremely bright but also very complex in composition, including infrared light, ultraviolet light and visible light. These strong lights are very harmful to operators, especially to their eyes. In order to protect the eyes from these strong lights, operators and people whose vision is damaged by strong lights need to wear protective devices, such as welding protective masks, welding goggles, welding helmets, etc.

The above-mentioned protective devices can be divided into two types: variable light and non-variable light. The non-variable light protective device requires the operator to operate the protective device with one hand and the welding gun with the other hand. This type of protective device is very inconvenient and affects the welding operation of the welding operator. The operator only needs to wear the variable light protective mask correctly to effectively protect the eyes, and the operator does not need to hold it. It greatly facilitates the welding operation of the operator. However, this self-variable light protective device changes its own light transmittance after being irradiated by the arc light to limit the input of strong light and heat into the field of view. The darkening process is theoretically very short, but in fact, some strong light still enters the field of view before the protective device darkens. In order to avoid this situation, it is particularly necessary to set up a protective device that darkens before the arc light reaches the field of view.

Summary of the invention

In view of the problems existing in the prior art, the present invention provides a device for protecting welders' eyes based on an Internet of Things welding system, which can effectively solve at least one of the above problems. When using this device, the command switch is pressed, and the front microswitch in the switch command is closed first, and a wireless signal is sent through the wireless signal transmitter connected to it in the handle. The wireless signal receiver on the protective mask receives the signal, and the circuit connected to it sends an electrical signal to the optical element. The optical element changes its own light transmittance under the action of the electrical signal, thereby limiting the intensity of the arc. The rear microswitch in the command switch is closed after the front microswitch, driving the welding gun to start setting the start of the welding process. Therefore, when the welding process starts to generate arc light, the protective mask has dimmed, and this time can be a very short time. But the darkening action occurs before the arc light is generated. The protective mask in the device system is worn on the operator's head, so the operator's welding operation is relatively convenient. In addition, the protective mask itself in the device It has a self-darkening function, and still has a certain protection function when it is exposed to arc light from welding guns other than this device.

The technical solution of the present invention is: a device for protecting welder's eyes based on the Internet of Things welding system, comprising a protective mask capable of receiving wireless signals and a welding gun capable of transmitting wireless signals;

The protective mask is equipped with a wireless signal receiver and an optical element connected to the wireless signal receiver;

The welding gun is equipped with a wireless signal transmitter and a command switch; the command switch is equipped with a front micro switch for activating the wireless signal transmitter and a rear micro switch for activating the process start command;

After pressing the command switch, the front micro switch is closed first to activate the wireless signal transmitter to send a wireless signal. After receiving the wireless signal, the wireless signal receiver on the protective mask controls the circuit connected to it to send an electrical signal to the optical element. The optical element changes its own light transmittance under the action of the electrical signal. The rear micro switch in the command switch is closed after the front micro switch, driving the welding gun to start setting the welding process. The front micro switch used to activate the wireless signal transmitter and the rear micro switch used to activate the process start command can be non-connected.

The communication signal between the signal receiver and the signal transmitter is a radio wave signal, which has the diffraction property of radio waves. When there is an object blocking the signal transmitter and the signal receiver, there is still reliable signal transmission between the two.

The command switch in the device can adapt to most common command switches and welding gun handles on the market, replacing the single micro switch in the common command switch on the market with a double micro switch, which can be used universally on the original handle, saving development costs and increasing the scope of use.

Furthermore, the front micro switch and the rear micro switch are closed in sequence through a stroke mechanism, and the idle stroke of the front micro switch is smaller than the idle stroke of the rear micro switch.

In the dimming process controlled by a wireless signal, the wireless signal may exist after the command switch is pressed, or it may be disconnected after a period of time after being pressed. Preferably, it is disconnected after a period of time. The disconnected signal may be a signal of a change in the current in the welding gun cable, or it may be a signal of the generation of arc light. Preferably, it is the current change in the welding gun. The shortening of the signal sending time period can reduce energy loss, especially when the power supply of the signal transmitter and the signal receiver of the device is a battery or a similar battery, the power supply life of these batteries or similar batteries can be extended. Specifically, the device for protecting the welder's eyes based on the Internet of Things welding system also includes a welding current detection element, which is connected to the wireless signal transmitter. When the welding current detection element detects the welding current, the wireless signal transmitter is controlled to stop sending signals. The welding current detection element is installed in the handle of the welding gun, or in the welding cable.

Furthermore, the wireless signal transmitter is connected to the welding power source through the cable of the welding gun to obtain power or is connected to the cable with a plug of the welding gun to obtain power or is equipped with a dedicated rechargeable battery pack. Specifically, two micro switches are installed on the PCB circuit board, and there is a connector on the PCB board for connecting the power supply and the control signal line. PCB Optionally, a portion of the welding gun cable is connected to the welding machine power supply to obtain power from the welding power supply. Optionally, a portion of the welding gun cable is connected, and the other end of this portion of the welding gun cable is connected to the mains socket to obtain power. Optionally, a portion of the welding gun cable is connected, and the other end of this portion of the welding gun cable is connected to a separate rechargeable battery box.

Furthermore, the optical element is equipped with a photosensitive element, which can automatically adjust the light transmittance under the irradiation of arc light.

Furthermore, the welding gun or protective mask has a matching button that can be used to match the wireless signals transmitted by the two. The matching button is installed in a small hole on the protective mask and fixed with a built-in nut. There may be more interference signals in the welding site. The signal transmitter and signal receiver in this device can transmit signals with a wider frequency band. When there is interference, other frequencies can be manually adjusted to transmit. When multiple devices work together in the same place, mutual interference between different devices can also be avoided. By adjusting the different transmission frequencies of the devices, reliable operation between the devices can be guaranteed. The protective mask and welding gun need to be paired before use. Each has a unique identity code. After matching, the receiver in the protective mask will not receive wireless signals sent by other welding guns. If you want to replace the welding gun or protective mask, you need to re-match.

Furthermore, the power supply of the optical element is a solar cell, a rechargeable battery, or other small batteries.

Furthermore, the protective mask is a welding helmet, welding mask, welding goggles or welding shield with automatic dimming function and wireless signal receiving capability.

The process of self-darkening of the protective mask in the device is represented as follows:

1: Arc generation

2: Optical components are exposed to light

3: Optical components darken

The process of the protective mask in the device being darkened under the control of the wireless signal is shown as follows

1: Press the command switch, the front micro switch closes, and the transmitter sends a wireless signal

2: The signal receiver receives the signal, and the optical element becomes dark under the electrical signal

3: The rear micro switch is closed, generating an arc

It can be seen that in the self-darkening process of the optical elements in the protective mask, a part of the strong light in the arc is transmitted to the user's field of view before the mask, while the darkening of the optical elements in the device under the control of the wireless signal is before the arc reaches the user's field of view, and the strong light in the arc cannot enter the user's field of view.

In the dimming process controlled by wireless signals, the optical element darkens before the arc occurs, and the advance time depends on how fast the operator presses the command switch and the distance between the front and rear micro switches. The distance between the front and rear micro switches is preferably controlled between 1-20 mm.

The signal receiver in the device is placed inside the protective mask and is integrated with the control circuit of the protective mask, which can reduce the opening The development cost is reduced, and it can be partially interchangeable with the optical components on the market. It can effectively increase the scope of use. However, it is not limited to being integrated with the protective mask, and can be placed in different positions of the mask, connected by a soft wire, etc. It is preferably integrated with the optical components on the protective mask.

The device of the present invention also has the advantage that when the welding gun is not in the field of vision, the protective mask can still be effectively darkened to prevent the operator's field of vision from being blocked during operation or the operator's head from turning and losing protection. This is due to the high penetration of wireless transmission, and even if the signal transmitter on the welding gun is not directly facing the mask, or there is a barrier between the two (such as a welding frame), it can still provide effective protection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a manual welding gun for transmitting wireless signals, a protective mask for receiving wireless signals, and related equipment.

Figure 2 shows the switch on the welding gun and the PCB board installed with the switch, and two micro switches on the PCB.

FIG. 3 is a timing chart of the welding process according to the present invention.

FIG. 4 is a schematic diagram of a travel mechanism on a command switch in the present invention.

FIG. 5 is a functional block diagram of a control circuit PCB board on the protective mask of the present invention.

FIG6 is a functional block diagram of a PCB board of a control circuit on a welding gun in the present invention.

Figure 7 shows the European coupling connector between the welding gun and the welding machine. The PCB control circuit in the welding gun obtains power through the coupling connector.

FIG8 is a system principle logic diagram of the device of the present invention.

Figure 9 Scenario Example 1.

Figure 10 Scenario Example 2.

FIG11 shows the European coupling connector of the welding gun and the welding machine. The PCB control circuit in the welding gun is powered by a rechargeable battery box that is matched with the PCB circuit board. The rechargeable battery box that is matched with the PCB circuit board is in the European coupling connector.

Bulleted List

DETAILED DESCRIPTION

In conjunction with the accompanying drawings, a device for protecting welder's eyes based on the Internet of Things welding system of the present invention is further described in detail.

According to the present invention shown in FIG1 , common tools used in welding are integrated into a system device using a wireless network. The protective mask 4 and the welding gun 5 shown in FIG1 of the device can communicate information. As shown in FIG3 , the protective mask 4 can be darkened for protection before the welding gun 5 emits an arc. Before the system is integrated, the darkening of the protective mask 4 occurs 0.1-0.15 seconds after the arc of the welding gun 5 occurs. During this period of time, the arc can enter the field of vision, which is detrimental to the operator's eye health and user experience.

As shown in FIG7 , the welding machine and the welding gun are connected through a European coupling connector. A pair of pins in the European coupling connector can provide a 5V DC power supply, and the PCB board shown in FIG2 in the welding gun is connected to the 5V power supply pin. The front micro switch 8 in FIG2 is a signal input element of the PCB board. When the command switch is pressed down to close the front micro switch 8, the high-frequency generator in the PCB board generates a high frequency to send the switch signal through the signal generator. The signal transmitter is fixed inside the handle 16 with glue and connected to the PCB through a soft wire. The PCB board is fixed on the command switch. The rear micro switch 9 on the PCB board is connected to the European coupling connector 15 through the welding gun cable as a start switch element for the welding process. When the start switch is pressed, the front micro switch 8 is closed first, and the rear micro switch 9 is closed later.

Put on the protective mask, press the matching button 7 in Figure 1 with one hand and the command switch 6 with the other hand for three seconds, the welding gun and the protective mask will automatically connect, and the mask will darken after 3 seconds, indicating that the matching is completed. The matching button 7 in Figure 1 is installed in a small hole on the protective mask 4 and fixed with a self-provided nut, and connected to the control integrated circuit of the optical element 3 with a soft wire. The signal receiver 1 in Figure 1 can be integrated into the control integrated circuit of the optical element 3, or it can be installed at other positions of the protective mask 4 through a soft wire connection. The control integrated circuit of the optical element 3 and the optical element 3 are a whole, and are fixed on the protective mask 4 by a clamp or screw. The signal receiver 1 in Figure 5 receives the wireless signal and transmits it to the operation control circuit 14 in the protective mask. After the control operation, it sends a command to the optical element 3 to make it darken.

Figure 4 shows the principle diagram of the travel mechanism of the two micro switches in the command switch. In the figure, the switch The key rotates around the axis, and when the switch key contacts the front micro switch, the rear micro switch still has a certain idle stroke a. The two micro switches use this idle stroke to achieve the time difference between the front and rear closing.

13 in FIG. 5 is a photosensitive element. When receiving arc light, it transmits a signal to the operation control circuit 14 in the protective mask. After the control operation, it sends a signal to the optical element 3 to make it darken or remain darkened. The photosensitive element 13 and the optical element 3 are an integral whole. 17 in FIG. 6 is a welding current detection element. When the welding current is detected, the signal transmitter 2 in FIG. 1 stops sending the signal. The optical element 3 remains darkened under the signal provided by the photosensitive element 13 in FIG. 5. The welding current detection element 17 can be installed in the handle 16 or in the welding cable and connected to the PCB board with a flexible wire.

The principle logic diagram of the system is shown in Figure 8. When using this device, press the command switch, the front micro switch in the switch command is closed first, and the wireless signal is sent through the wireless signal transmitter connected to it in the handle. The wireless signal receiver on the protective mask receives the signal, and the circuit connected to it sends an electrical signal to the optical element. The optical element changes its own light transmittance under the action of the electrical signal, thereby limiting the intensity of the arc. The rear micro switch in the command switch is closed after the front micro switch, driving the welding gun to start setting the start of the welding process. Therefore, when the welding process starts to generate arc light, the protective mask has darkened, and this time can be a very short time. But the darkening action is before the arc light is generated. The protective mask in the device system is worn on the operator's head, so the operator's welding operation is relatively convenient. In addition, the protective mask in the device itself has a self-darkening function, and it still has a certain protection function when it is exposed to arc light emitted by a welding gun other than the device.

FIG9 is an example of using the device in special occasions, which can better reflect the advantages of the device. The device uses the diffraction of waves to ensure that when welding some frames and some complex welding components, there is a workpiece or other object blocking the signal transmitter and the receiver, and the signal can still be transmitted reliably. Ensure that the device can play the role of protecting the welder's eyes.

Figure 10 is an example of a special case where the device is used. When an obstacle (workpiece) blocks the photosensitive element area on the protective mask, the photosensitive element cannot be irradiated by the arc light. In this case, the LCD panel of the protective mask remains dark under the control of the wireless signal until the end of the welding process.

FIG11 illustrates a special case in which the device is used, a welding gun and a European coupling connector of a welding machine, a PCB control circuit in the welding gun being powered by a rechargeable battery box matching the PCB circuit board, and a rechargeable battery box matching the PCB circuit board being in the European coupling connector.

The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims (10)

A device for protecting welder's eyes based on the Internet of Things welding system, characterized by comprising a protective mask capable of receiving wireless signals and a welding gun capable of transmitting wireless signals; The protective mask is equipped with a wireless signal receiver and an optical element connected to the wireless signal receiver; The welding gun is equipped with a wireless signal transmitter and a command switch; the command switch is equipped with a front micro switch for activating the wireless signal transmitter and a rear micro switch for activating the process start command; After pressing the command switch, the front microswitch closes first to activate the wireless signal transmitter to send a wireless signal. After receiving the wireless signal, the wireless signal receiver on the protective mask controls the circuit connected to it to send an electrical signal to the optical element. The optical element changes its own transmittance under the action of the electrical signal; the rear microswitch in the command switch closes after the front microswitch, driving the welding gun to start setting the welding process. According to the device for protecting welder's eyes based on the Internet of Things welding system according to claim 1, it is characterized in that the front micro switch and the rear micro switch are closed in sequence through a stroke mechanism, and the idle stroke of the front micro switch is smaller than the idle stroke of the rear micro switch. According to the device for protecting welder's eyes based on the Internet of Things welding system according to claim 1, it is characterized by: further comprising a welding current detection element, wherein the welding current detection element is connected to a wireless signal transmitter, and when the welding current detection element detects the welding current, the wireless signal transmitter is controlled to stop sending the signal. According to the device for protecting welder's eyes based on the Internet of Things welding system according to claim 3, it is characterized in that the welding current detection element is installed in the handle of the welding gun or in the welding cable. According to a device for protecting welders' eyes based on an Internet of Things welding system according to claim 1, it is characterized in that: the wireless signal transmitter is connected to a welding power source through a cable of the welding gun to obtain power or is connected to a cable with a plug of the welding gun to obtain power or is equipped with a dedicated rechargeable battery pack power supply. According to the device for protecting welder's eyes based on the Internet of Things welding system according to claim 1, it is characterized in that: the optical element is equipped with a photosensitive element, which can automatically adjust the transmittance under the irradiation of arc light. According to the device for protecting welder's eyes based on the Internet of Things welding system according to claim 1, it is characterized in that: there is a matching button on the welding gun or the protective mask that can be used to match the wireless signal transmitted by the two. According to the device for protecting welder's eyes based on the Internet of Things welding system according to claim 7, it is characterized in that the matching button is installed in a small hole on the protective mask and fixed with a self-provided nut. According to the device for protecting welder's eyes based on the Internet of Things welding system according to claim 1, it is characterized in that the power supply of the optical element is a solar cell or a rechargeable battery or other small battery. According to the device for protecting welder's eyes based on the Internet of Things welding system according to claim 1, it is characterized in that The protective mask is a welding helmet, welding mask, welding goggles or welding shield with automatic dimming function and wireless signal receiving capability.