Gas welding control terminal and gas welding system

Abstract

The invention discloses a gas welding control terminal and a gas welding system, which are applied to the technical field of gas welding equipment and are used for solving the problem of poor safety of gas welding equipment in the prior art. The method specifically comprises the steps that a communication establishment request is received, after communication connection with a user side passing permission verification is established, a starting instruction sent by the user side is received, environment data at a monitoring point is collected in real time, and a gas supply pipeline of a gas source in gas welding equipment is connected or disconnected; and according to the environment data, determining operation state parameters of the electric welding equipment, when the operation state parameters are in a non-standard-exceeding state, keeping connection of a gas supply pipeline of a gas source in the gas welding equipment, and when the operation state parameters are in a standard-exceeding state, cutting off the gas supply pipeline of the gas source in the gas welding equipment. In this way, the gas welding control terminal is started only after the user has the use permission, and a strict identity permission auditing mechanism is added; and real-time monitoring of environment data is achieved, safety accidents are avoided, and the safety of gas welding equipment is improved from multiple angles.

Description

Technical Field

[0001] The present application relates to the technical field of gas welding equipment, and in particular to a gas welding control terminal and a gas welding system. Background Art

[0002] Gas welding equipment, as a convenient tool that relies on the combustion of a mixture of combustible gas and combustion-supporting gas or inert gas to produce flames for metal welding, is widely used in many occasions that require flexible welding operations due to its simple equipment structure, flexible and changeable operation, and wide applicability. However, in actual application, the control of gas welding equipment often focuses on the precise regulation of welding operations, but largely ignores the potential safety risks during use.

[0003] At present, there are cases where users of gas welding equipment lack sufficient safety awareness and professional skills training, which leads to serious safety accidents such as flammable gas leakage during operation, which not only threatens the life safety of operators, but also affects the operation efficiency and equipment stability. In addition, there are obvious deficiencies in the current authority management of gas welding equipment users, and there is a lack of strict identity authentication and authority review mechanisms. This results in almost anyone being able to operate the equipment at will, greatly increasing the risk of safety accidents caused by improper operation. With the popularization and application of gas welding equipment in all walks of life, the use environment it faces is becoming more complex and changeable, which undoubtedly poses a higher challenge to the safety of the equipment. Summary of the invention

[0004] The present application provides a gas welding control terminal and a gas welding system, which are used to solve the problem of poor safety of gas welding equipment in the prior art.

[0005] The technical solutions provided by this application are as follows: On the one hand, the present application provides a gas welding control terminal, including: a communication module, a control module, a data acquisition module and a valve module; the control module is respectively connected to the data acquisition module, the communication module and the valve module of the gas welding equipment; the communication module is connected to the cloud server; The communication module is used to receive a communication establishment request sent by the user end, and send the communication establishment request to the control module; wherein the communication establishment request is an instruction generated by the user end after passing the authority verification of the cloud server for establishing a communication connection with the gas welding control terminal; and is also used to receive a start instruction sent by the user end, and send the start instruction to the control module; The control module is used to establish a communication connection with the user end after receiving a communication request instruction; it is also used to control the data acquisition module to start data acquisition after receiving a start instruction, and control the valve module to connect the gas supply pipeline of the gas source in the gas welding equipment; and receive the environmental data of the gas welding equipment sent by the data acquisition module, determine the operating state parameters of the electric welding equipment according to the environmental data, and send a valve holding control instruction to the valve module when the operating state parameters are in a state of not exceeding the standard, and send a valve closing control instruction to the valve module when the operating state parameters are in a state of exceeding the standard; A data acquisition module is used to collect environmental data of the gas welding equipment in real time and send the collected environmental data to the control module; The valve module is used to connect the gas supply pipeline of the gas source in the gas welding equipment when receiving the valve holding control instruction sent by the control module; and is used to cut off the gas supply pipeline of the gas source in the gas welding equipment when receiving the valve closing control instruction sent by the control module.

[0006] Optionally, the control module is specifically used for: Input the current environmental threshold and the environmental data in the preset time period before the current time into the environmental threshold correction model, and obtain the correction amount corresponding to the current environmental threshold output by the environmental threshold correction model; wherein the current environmental threshold is the preset initial threshold when the correction is made for the first time, and the current environmental threshold is the target environmental threshold corresponding to the previous preset time period when the correction is not made for the first time; Adjust the current environmental threshold according to the correction amount to obtain the target environmental threshold; Determine whether the environmental data exceeds the target environmental threshold; If so, it is determined that the operating state parameters of the gas welding equipment are in an over-standard state, and a valve shut-off control instruction is generated and sent to the valve module; If not, it is determined that the operating state parameters of the gas welding equipment are within the standard state, and a valve holding control instruction is generated and sent to the valve module.

[0007] Optionally, the data acquisition module includes: a temperature and humidity acquisition circuit and a combustible gas acquisition circuit; The temperature and humidity acquisition circuit includes: at least one temperature and humidity sensor; the output end of each temperature and humidity sensor is respectively connected to the control module; the power supply end of each temperature and humidity sensor is respectively connected to the output end of the second power supply circuit; each temperature and humidity sensor is arranged at each monitoring point of the gas welding equipment; the temperature and humidity acquisition circuit is used to collect ambient temperature data and ambient humidity data, and send the ambient temperature data and ambient humidity data to the control module; The combustible gas collection circuit includes: a combustible gas sensor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor and a first capacitor; the first end of the combustible gas sensor is connected to the output end of the first power supply circuit, the second end of the combustible gas sensor is connected to the collector of the first transistor, the third end of the combustible gas sensor is connected to the second power supply circuit via the first resistor, and the fourth end of the combustible gas sensor is respectively connected to the control module, the first end of the second resistor and the first end of the first capacitor; the second end of the second resistor and the second end of the first capacitor are both connected to the ground; the base of the first transistor is respectively connected to the control module and the first end of the fourth resistor via the third resistor, and the emitter of the first transistor is respectively connected to the ground and the second end of the fourth resistor; the combustible gas collection circuit is used to collect combustible gas concentration data and send the combustible gas concentration data to the control module.

[0008] Optionally, the gas welding control terminal provided in the present application further includes: a power supply control module; The input end of the power control module is electrically connected to the internal power supply, the output end of the power control module is electrically connected to the first power circuit, and the control end of the power control module is electrically connected to the control module; the power control module is used to connect or disconnect the internal power supply and the gas welding control terminal; The data acquisition module also includes: a power supply voltage acquisition circuit; The power supply voltage acquisition circuit includes: at least one first voltage-dividing resistor, at least one second voltage-dividing resistor, a third capacitor and a fourth capacitor; the first end of each first voltage-dividing resistor is connected to the internal power supply, and the second end of each first voltage-dividing resistor is connected to the voltage detection end; the first end of each second voltage-dividing resistor is connected to the voltage detection end, and the second end of each second voltage-dividing resistor is connected to the ground; the first end of the third capacitor is connected to the internal power supply, and the second end of the third capacitor is connected to the ground; the first end of the fourth capacitor is connected to the voltage detection end, and the second end of the fourth capacitor is connected to the ground; the power supply voltage acquisition circuit is used to collect the power supply voltage data input from the internal power supply to the gas welding control terminal, and send the power supply voltage data to the control module; The control module is used to receive power supply voltage data, and when the power supply voltage data is lower than a preset first voltage threshold, the power supply control module is controlled to cut off the connection between the internal power supply and the gas welding control terminal.

[0009] Optionally, the gas welding control terminal provided by the present application further includes: a human-computer interaction module; The human-machine interaction module is electrically connected to the control module; the human-machine interaction module is used to receive the early warning instruction sent by the control module and execute the early warning operation corresponding to the early warning instruction; The control module is also used to input the current environmental data into the environmental prediction model to obtain the predicted environmental data output by the environmental prediction model; based on the preset environmental warning level and the threshold range corresponding to the environmental warning level, determine the environmental warning level corresponding to the threshold range to which the predicted environmental data belongs as the target environmental warning level; based on the corresponding relationship between the environmental warning level and the warning instruction, send the warning instruction corresponding to the target environmental warning level to the human-computer interaction module.

[0010] Optionally, the valve module includes: a high torque reduction motor, a valve drive circuit and a safety valve; The input end of the valve drive circuit is connected to the control module, and the output end of the valve drive circuit is connected to the input end of the high torque reduction motor; the safety valve is arranged on the gas supply pipeline of the gas source in the gas welding equipment, and the control end of the valve is connected to the high torque reduction motor; The valve drive circuit is used to receive a valve holding control instruction or a valve closing control instruction, and convert the valve holding control instruction or the valve closing control instruction into a corresponding motor drive signal; The high torque reduction motor is used to drive the safety valve to open or close under the control of the motor drive signal; The safety valve is used to connect or cut off the gas supply pipeline of the gas source in the gas welding equipment.

[0011] Optionally, the valve drive circuit includes: a motor drive chip, a motor interface, a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor; The first input terminal and the second input terminal of the motor driving chip are connected to the control module respectively, the first output terminal of the motor driving chip is connected to the first terminal of the motor interface, and the second output terminal of the motor driving chip is connected to the second terminal of the motor interface; The first end of the fifth resistor is connected to the third end of the motor interface, the second end of the fifth resistor is connected to the first end of the sixth resistor and the control module respectively; the second end of the sixth resistor is connected to the ground; The first end of the seventh resistor is connected to the fourth end of the motor interface, the second end of the seventh resistor is connected to the first end of the eighth resistor and the control module respectively; the second end of the eighth resistor is connected to the ground.

[0012] Optionally, the human-computer interaction module includes an indication circuit and a key circuit; the indication circuit and the key circuit are respectively connected to the control module; The indication circuit is used to indicate the environmental warning level and working status of the gas welding control terminal, and the working status includes the communication status, the power status and the valve status in the valve module; The key circuit is used to trigger the control module to control the operating state of the gas welding control terminal, and the operating state includes power on, power off and reset.

[0013] Optionally, the communication module includes: a wired communication module and / or a wireless communication module; The wired communication module includes a serial communication circuit or a parallel communication circuit; the wired communication module is used to transmit data between the gas welding control terminal and the external device in a wired communication manner; The wireless communication module includes at least one of a ZigBee circuit, a WIFI circuit, a 4G circuit, a 5G circuit, an NFC circuit, a Bluetooth circuit and a radio frequency identification circuit; the wireless communication module is used to transmit data between the gas welding control terminal and an external device by wireless communication.

[0014] On the other hand, the present application provides a gas welding system, including: a user end, a gas welding device, a cloud server and the above-mentioned gas welding control terminal provided in the present application; the cloud server is respectively connected to the user end and the gas welding control terminal for communication; the gas welding control terminal is arranged on the gas supply pipeline of the gas source in the gas welding device; The user end is used to receive the qualification information input by the user and send the qualification information to the cloud server; it is also used to establish a communication connection with the gas welding control terminal by sending a communication request after receiving the audit result of the passed authority verification, and send a start instruction to the gas welding control terminal; The cloud server is used to receive and verify the qualification information. When the qualification information is verified to be valid, it sends the review result of the permission verification to the user end; Gas welding equipment, used to perform gas welding operations after connecting to a gas source; wherein the gas welding equipment comprises a gas welding gun and a gas source connected by a gas supply pipeline; The gas welding control terminal is used to receive a communication establishment request sent by a user end and establish a communication connection with the user end; after receiving a start instruction, it starts to collect environmental data at a monitoring point in the gas welding equipment in real time, and connects or cuts off the gas supply pipeline of the gas source in the gas welding equipment; determines the operating status parameters of the electric welding equipment according to the environmental data, and connects the gas supply pipeline of the gas source in the gas welding equipment when the operating status parameters are within the standard state, and cuts off the gas supply pipeline of the gas source in the gas welding equipment when the operating status parameters are beyond the standard state.

[0015] The beneficial effects of this application are as follows: In the present application, the gas welding control terminal controls the valve module to connect the gas supply pipeline only after receiving the permission start instruction indicating that the user has the permission to use it, thereby adding a strict identity authentication and permission review mechanism to avoid arbitrary operation of the gas welding equipment, greatly reducing the risk of safety accidents caused by improper operation; by setting up a data acquisition module to collect the environmental data of the gas welding equipment in real time, the control module controls the valve module to connect or cut off the corresponding gas supply pipeline according to the environmental data, thereby realizing real-time monitoring of the environmental data, taking the potential safety hazards in the environment into consideration, avoiding the occurrence of safety accidents, and improving the safety of the gas welding equipment from multiple angles.

[0016] Other features and advantages of the present application will be described in the subsequent description, and in part, will become apparent from the description, or will be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is a schematic diagram of the first structure of the gas welding control terminal in the embodiment of the present application; Figure 2 This is a schematic diagram of the second structure of the gas welding control terminal in the embodiment of the present application; Figure 3 This is a third structural schematic diagram of the gas welding control terminal in the embodiment of the present application; Figure 4 This is a fourth structural schematic diagram of the gas welding control terminal in the embodiment of the present application; Figure 5 This is a circuit diagram of a power supply control module of a gas welding control terminal in an embodiment of the present application; Figure 6 This is a fifth structural schematic diagram of the gas welding control terminal in the embodiment of the present application; Figure 7 This is a schematic diagram of the structure of the antenna circuit in the wireless communication module in an embodiment of the present application; Figure 8 This is a schematic diagram of the structure of the eSIM card circuit of the wireless communication module in an embodiment of the present application; Fig. 9 Schematic diagram of the structure of the level conversion circuit of the wireless communication module in the embodiment of the present application; Fig.10 This is a schematic diagram of the structure of the power supply circuit of the wireless communication module in the embodiment of the present application; Fig.11 It is a structural schematic diagram of the communication interface circuit of the wireless communication module in the embodiment of the present application; Fig.12 This is a schematic diagram of the indicating circuit structure of the human-computer interaction module in the embodiment of the present application; Fig.13 Schematic diagram of the structure of the gas welding system in the embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and beneficial effects of this application clearer, the technical solution in the embodiment of this application will be clearly and completely described below in conjunction with the drawings in the embodiment of this application. Obviously, the described embodiment is only a part of the embodiment of this application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] The present application embodiment provides a gas welding control terminal 100, see Figure 1 As shown, the gas welding control terminal 100 provided in the embodiment of the present application at least includes: a communication module 110, a control module 120, a data acquisition module 130 and a valve module 140; the control module 120 is electrically connected to the data acquisition module 130, the communication module 110 and the valve module 140 of the gas welding equipment respectively; the communication module 110 is connected to the cloud server for communication; The communication module 110 is used to receive a communication establishment request sent by the user end, and send the communication establishment request to the control module 120; wherein the communication request is an instruction generated by the user end after passing the authority verification of the cloud server for establishing a communication connection with the gas welding control terminal 100; it is also used to receive a start instruction sent by the user end, and send the start instruction to the control module 120; The control module 120 is used to establish a communication connection with the user end after receiving a communication request instruction; it is also used to control the data acquisition module 130 to start data acquisition after receiving a start instruction, and control the valve module 140 to connect the gas supply pipeline of the gas source in the gas welding equipment; and receive the environmental data of the gas welding equipment sent by the data acquisition module 130, determine the operating state parameters of the electric welding equipment according to the environmental data, and send a valve holding control instruction to the valve module 140 when the operating state parameters are in a state of not exceeding the standard, and send a valve closing control instruction to the valve module 140 when the operating state parameters are in a state of exceeding the standard; The data acquisition module 130 is used to collect environmental data in the gas welding equipment in real time and send the collected environmental data to the control module 120; The valve module 140 is used to connect the gas supply pipeline of the gas source in the gas welding equipment when receiving the valve holding control instruction sent by the control module 120; and is used to cut off the gas supply pipeline of the gas source in the gas welding equipment when receiving the valve closing control instruction sent by the control module 120.

[0020] exist Figure 1In the gas welding control terminal 100 shown, the communication module 110 can establish a communication connection with the user end that has passed the authority verification, so that the user end can send a start instruction to control the data acquisition module 130 to start data acquisition, and control the valve module 140 to connect the gas supply pipeline of the gas source in the gas welding equipment. The user end can also send other instructions to change the working state of the gas welding control terminal 100. The communication module 110 can also establish a communication connection with the cloud server to upload the collected data and working state. The user end can only establish a communication connection with the gas welding control terminal 100 after passing the authority verification of the cloud server. The way for the user end to establish a communication connection with the gas welding control terminal 100 can be that the user end scans the QR code set on the shell of the gas welding control terminal 100 or manually inputs the identification information of the device, and a corresponding communication request is generated and sent to the communication module in the gas welding control terminal 100. The communication module sends the communication request to the control module 120. When the identification information in the communication request is the same as the identification information of the gas welding control terminal 100, the control module controls the communication module to establish a communication connection with the user end. The environmental data may include at least one of environmental temperature data, environmental humidity data, combustible gas concentration data and harmful gas concentration data. The control module 120 includes a controller, and an environmental threshold value that can be corrected according to the environmental data is set in the control module 120, and the environmental threshold value includes at least one of an environmental temperature threshold value, an environmental humidity threshold value, a combustible gas concentration threshold value and a harmful gas concentration threshold value. When the terminal is just powered on, the valve module 140 is in a state corresponding to disconnecting the gas supply pipeline of the gas source in the gas welding equipment. After receiving the authority start instruction, the control module 120 controls the valve module 140 to work in the initial connection state, that is, the control valve module 140 connects and maintains the state corresponding to the gas supply pipeline of the gas source in the gas welding equipment. The gas supply pipeline that the valve module 140 can connect or disconnect is the gas supply pipeline of the inert gas source or the oxygen gas source.

[0021] In actual applications, the communication module 110 sends a start instruction to the control module 120 so that the control module 120 controls the data acquisition module 130. The data acquisition module 130 starts to collect environmental data in real time and sends the environmental data to the control module 120. The control module 120 determines the operating status parameters of the electric welding equipment according to the environmental data. When the operating status parameters are within the standard state, the valve holding control instruction is sent to the valve module 140. The valve module 140 keeps the gas supply pipeline of the gas source in the gas welding equipment connected. When the operating status parameters are beyond the standard state, the valve closing control instruction is sent to the valve module 140. The valve module 140 disconnects the gas supply pipeline of the gas source in the gas welding equipment.

[0022] In specific implementation, the control module is specifically used for: First, the current environmental threshold and the environmental data in the preset time period before the current time are input into the environmental threshold correction model, and the correction amount corresponding to the current environmental threshold output by the environmental threshold correction model is obtained; wherein the current environmental threshold is the preset initial threshold when the correction is made for the first time, and the current environmental threshold is the target environmental threshold corresponding to the previous preset time period when the correction is not made for the first time; Then, the current environmental threshold is adjusted according to the correction amount to obtain the target environmental threshold; Next, determine whether the environmental data exceeds the target environmental threshold; Finally, if yes, it is determined that the operating status parameters of the gas welding equipment are in an over-standard state, and a valve closing control instruction is generated and sent to the valve module; if no, it is determined that the operating status parameters of the gas welding equipment are within the standard state, and a valve keeping control instruction is generated and sent to the valve module.

[0023] In practical applications, the target environmental threshold is the environmental threshold corrected according to the correction amount. The environmental threshold correction model can be a neural network model based on a machine learning method. The environmental threshold correction model outputs the correction amount corresponding to the current environmental threshold according to the environmental data in the first time input and the current environmental threshold. The current environmental threshold is added with the correction amount to obtain the target environmental threshold. When the environmental data exceeds the target environmental threshold, it means that the operating state parameters of the gas welding equipment are in an over-standard state. A valve shut-off control instruction is generated and sent to the valve module so that the valve module cuts off the gas supply pipeline of the gas source in the gas welding equipment. If the environmental data does not exceed the target environmental threshold, it means that the operating state parameters of the gas welding equipment are in a state that is not over-standard, then a valve holding control instruction is generated and sent to the valve module so that the valve module keeps the gas supply pipeline of the gas source connected.

[0024] In a possible implementation, the specific training method of the environment threshold correction model may be, but is not limited to, the following methods: First, a first training set is obtained; wherein the first training set includes multiple groups of environmental threshold training data, wherein each group of environmental threshold training data includes environmental data and environmental thresholds within a first time period; Then, each set of environmental threshold training data in the first training set is input into the environmental threshold correction model to obtain the correction amount corresponding to each set of environmental threshold training data; Next, based on the correction amount corresponding to each set of environmental threshold training data and the annotation result of the correction amount, the first loss function value is determined; wherein the annotation result of the correction amount is the true correction amount of the current environmental threshold; Finally, based on the first loss function value, the model parameters of the environmental threshold correction model are updated.

[0025] In a specific implementation, each group of environmental threshold training data in the first training set includes environmental data and environmental thresholds within the first time. The first loss function can be one of a mean square error function, a root mean square error function, and a mean absolute error function. The first loss function value output by the first loss function can evaluate the degree of difference between the correction amount output by the environmental threshold correction model and the annotation result of the correction amount. The smaller the first loss function value, the higher the prediction accuracy of the environmental threshold correction model. Based on the first loss function value, it is determined whether the first loss function value is less than the first preset threshold; wherein the first preset threshold can be set according to actual needs. If the first loss function value is not less than the preset threshold, the model parameters of the environmental threshold correction model are updated and retrained until the first loss function value is less than the preset threshold, and the final environmental threshold correction model is obtained.

[0026] In one possible implementation, see Figure 2 and Figure 3 As shown, the control module 120 can also be used to communicate wirelessly with the user end or the cloud server by means of Bluetooth communication. Correspondingly, the control module may include a controller 121 and a Bluetooth circuit 122; the controller 121 implements the control function of the control module in the gas welding control terminal, and the Bluetooth circuit 122 is used to communicate wirelessly with the user end or the cloud server by means of Bluetooth communication. The control module 120 may also include a controller 123 with integrated Bluetooth communication function; the controller 123 with integrated Bluetooth communication function can implement the control function of the control module 120 in the gas welding control terminal, and can also communicate wirelessly with the user end or the cloud server by means of Bluetooth communication.

[0027] In the specific implementation, the data acquisition module in the gas welding control terminal has a variety of structures to realize its functions, see Figure 4 As shown, the data acquisition module may include: a temperature and humidity acquisition circuit 131 and a combustible gas acquisition circuit 132; The temperature and humidity acquisition circuit 131 includes: at least one temperature and humidity sensor XHT; the output end of each temperature and humidity sensor XHT is respectively connected to the control module 120; the power supply end of each temperature and humidity sensor XHT is respectively connected to the output end of the second power supply circuit 162; each temperature and humidity sensor XHT is set at each monitoring point of the gas welding equipment; the temperature and humidity acquisition circuit is used to collect ambient temperature data and ambient humidity data, and send the ambient temperature data and ambient humidity data to the control module; The combustible gas collection circuit 132 includes: a combustible gas sensor MP, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first transistor P1 and a first capacitor C1; the first end of the combustible gas sensor MP is connected to the output end of the first power supply circuit 161, the second end of the combustible gas sensor MP is connected to the collector of the first transistor P1, the third end of the combustible gas sensor MP is connected to the second power supply circuit 162 via the first resistor R1, and the fourth end of the combustible gas sensor MP is respectively connected to the control module 120, the first end of the second resistor R2 and the first end of the first capacitor C1; the second end of the second resistor R2 and the second end of the first capacitor C1 are both connected to the ground; the base of the first transistor P1 is respectively connected to the control module and the first end of the fourth resistor R4 via the third resistor R3, and the emitter of the first transistor P1 is respectively connected to the ground and the second end of the fourth resistor R4; the combustible gas collection circuit 132 is used to collect combustible gas concentration data and send the combustible gas concentration data to the control module 120.

[0028] exist Figure 4 In the temperature and humidity acquisition circuit 131 of the gas welding control terminal shown, the temperature and humidity sensor XHT is used to collect the ambient temperature data and ambient humidity data of the monitoring point. Among them, the number of monitoring points in the gas welding equipment can be one or more. In order to realize the integrated setting of the gas source control device, the monitoring point is generally set at the position after the pressure reducing valve on the gas supply pipeline connecting the inert gas source or oxygen gas source in the gas welding equipment and the electric welder. When the number of monitoring points is multiple, the number of temperature and humidity sensors XHT is correspondingly set to multiple. In addition, in order to realize the accurate collection of ambient temperature and humidity, multiple temperature and humidity sensors XHT can be set at the same monitoring point for real-time data collection. The control module 120 averages the data fed back by the multiple temperature and humidity sensors XHT set at the same monitoring point, and the multiple sensors can also serve as backup for each other.

[0029] exist Figure 4In the combustible gas collection circuit 132 of the gas welding control terminal shown, the combustible gas sensor MP is used to collect the combustible gas concentration data in the air in real time, the first resistor R1 is used to adjust the current input to the combustible gas sensor MP, and the second resistor R2 and the first capacitor C1 are used to filter the combustible gas concentration data output by the combustible gas sensor MP. The first transistor P1 is used to connect or disconnect the combustible gas sensor MP and the ground under the control of the control module 120 to control whether the combustible gas sensor MP is working. The third resistor R3 is used to limit the base current of the first transistor P1, and can also ensure that the first transistor P1 has a stable current and voltage under the DC working state, so that the working state of the first transistor P1 is more reliable and stable. The fourth resistor R4 is used to prevent the base of the first transistor P1 from being suspended, ensure that the first transistor P1 is reliably cut off, and avoid misconnection of the first transistor P1. Since the combustible gas sensor MP consumes relatively large power, a first transistor P1 controlled by the control module 120 may be provided to connect the combustible gas sensor MP to the ground at preset time intervals, so that the combustible gas sensor MP works intermittently.

[0030] In one possible implementation, see Figure 4 As shown, the power supply circuit 160 inside the gas source control device includes a first power supply circuit 161 and a second power supply circuit 162; the output end VDD1 of the internal power supply is connected to the input end of the first power supply circuit 161, the output end VDD2 of the first power supply circuit 161 is connected to the input end of the second power supply circuit 162, and the output end VDD3 of the second power supply circuit 162 is connected to the corresponding chip in the device; the first power supply circuit 161 is used to convert the first voltage provided by the internal power supply into a second voltage; the second power supply circuit 162 is used to convert the second voltage provided by the first power supply circuit into a third voltage. The power supply of different chips in the device is realized based on the first voltage, the second voltage and the third voltage. The first power supply circuit 161 is composed of a voltage conversion chip that can realize the conversion of the first voltage into the second voltage, an inherent connection element of the voltage conversion chip, and a filter capacitor arranged at the output end of the voltage conversion chip. The second power supply circuit 162 is composed of a voltage conversion chip that can realize the conversion of the second voltage into the third voltage, an inherent connection element of the voltage conversion chip, and a filter capacitor arranged at the output end of the voltage conversion chip. Specifically, the first voltage provided by the internal power supply is generally 12V, the second voltage is generally 3.8V, and the third voltage is generally 3.3V.

[0031] In one possible implementation, see Figure 4 As shown, the gas welding control terminal further includes: a power supply control module 170; The input end of the power control module 170 is electrically connected to the internal power supply, the output end 170 of the power control module 170 is electrically connected to the first power circuit 161, and the control end of the power control module 170 is electrically connected to the control module 120; the power control module 170 is used to connect or disconnect the connection between the internal power supply and the gas welding control terminal; The data acquisition module also includes: a power supply voltage acquisition circuit 133; The power supply voltage acquisition circuit 133 includes: at least one first voltage-dividing resistor Rv1, at least one second voltage-dividing resistor Rv2, a third capacitor C3 and a fourth capacitor C4; the first end of each first voltage-dividing resistor Rv1 is connected to the internal power supply, and the second end of each first voltage-dividing resistor Rv1 is connected to the voltage detection end; the first end of each second voltage-dividing resistor Rv2 is connected to the voltage detection end, and the second end of each second voltage-dividing resistor Rv2 is connected to the ground; the first end of the third capacitor C3 is connected to the internal power supply, and the second end of the third capacitor C3 is connected to the ground; the first end of the fourth capacitor C4 is connected to the voltage detection end, and the second end of the fourth capacitor C4 is connected to the ground; the power supply voltage acquisition circuit 133 is used to collect the power supply voltage data input from the internal power supply to the gas welding control terminal, and send the power supply voltage data to the control module 120; The control module 120 is used to receive power supply voltage data. When the power supply voltage data is lower than a preset first voltage threshold, the control power supply control module 170 is controlled to cut off the connection between the internal power supply and the gas welding control terminal.

[0032] In practical applications, since the internal power supply has insufficient supply voltage, a power supply voltage acquisition circuit 133 is set to collect power supply voltage data in real time. When the supply voltage data is lower than a preset first voltage threshold, the control module 120 can control the power supply control module 170 to cut off the connection between the internal power supply and the gas welding control terminal, so as to realize that when the supply voltage of the internal power supply is insufficient, the gas welding control terminal is powered off and shut down in time, so as to avoid the gas welding control terminal from misjudging due to insufficient supply voltage. In addition, a second voltage threshold and a third voltage threshold can also be set, and the first voltage threshold, the second voltage threshold and the third voltage threshold increase in sequence. When the supply voltage data is lower than the preset second voltage threshold at the second voltage threshold and the third voltage threshold, the corresponding indicator light is controlled to flash, and when the supply voltage data is lower than the preset third voltage threshold, the corresponding indicator light is controlled to be always on, so as to provide users with different degrees of supply voltage reduction prompts.

[0033] exist Figure 4In the power supply voltage acquisition circuit 133 of the gas welding control terminal shown, the third capacitor C3 and the fourth capacitor C4 both play a filtering role, and at least one first voltage-dividing resistor Rv1 and at least one second voltage-dividing resistor Rv2 form a voltage-dividing resistor structure, which reduces the internal power supply to the input terminal detection voltage and inputs it to the control module. The number and resistance value of the first voltage-dividing resistor Rv1 and the second voltage-dividing resistor Rv2 are determined by the first voltage of the internal power supply and the magnitude of the input terminal detection voltage.

[0034] In one possible implementation, see Figure 5 As shown, the gas source control device may also be provided with a power control circuit, which includes a switch S, an optical coupling isolation device, a first input resistor Ri1, a second input resistor Ri2, a third input resistor Ri3, and a main transistor P0; The first end of the switch S is connected to the first end of the optocoupler isolation device via the first input resistor Ri1, the second end of the switch S is connected to the third end of the optocoupler isolation device, and the third and fourth ends of the switch S are connected to the internal power supply; the second end of the optocoupler isolation device is connected to the ground, and the fourth end of the optocoupler isolation device is connected to the internal power supply; the collector of the main transistor P0 is connected to the first end of the optocoupler isolation device, the emitter of the main transistor P0 is connected to the ground, the base of the main transistor P0 is connected to the control module via the second input resistor Ri2, and the base of the main transistor P0 is also connected to the ground via the third input resistor Ri3. The control module can control whether the gas source control device is connected to the internal power supply by controlling the opening and closing of the main transistor P0.

[0035] In one possible implementation, see Figure 6 As shown, in order to realize early warning of environmental data, the gas welding control terminal is also provided with: a human-computer interaction module 180; The human-computer interaction module 180 is electrically connected to the control module 120; the human-computer interaction module 180 is used to receive the warning instruction sent by the control module 120 and execute the warning operation corresponding to the warning instruction; The control module 120 is also used to input the current environmental data into the environmental prediction model to obtain the predicted environmental data output by the environmental prediction model; based on the preset environmental warning level and the threshold range corresponding to the environmental warning level, determine the environmental warning level corresponding to the threshold range to which the predicted environmental data belongs as the target environmental warning level; based on the corresponding relationship between the environmental warning level and the warning instruction, send the warning instruction corresponding to the target environmental warning level to the alarm module.

[0036] In practical applications, the predicted environmental data is the environmental data corresponding to the time of the preset time interval after the predicted current time. The environmental prediction model can be a neural network model based on a machine learning method, and the environmental prediction model outputs the predicted environmental data according to the input current environmental data. The environmental warning level is the warning level of the predicted environmental data, and the environmental warning level can include a first-level environmental warning, a second-level environmental warning, and a third-level environmental warning. Each environmental warning level corresponds to a warning instruction. The warning instruction corresponding to the first-level environmental warning is to control the human-computer interaction module 180 to display the environmental warning level and the predicted environmental data, light up the corresponding indicator light or make the indicator light display the corresponding color; the warning instruction corresponding to the second-level environmental warning is to control the human-computer interaction module 180 to display the environmental warning level and the predicted environmental data, light up the corresponding indicator light or make the indicator light display the corresponding color, and the warning instruction corresponding to the third-level environmental warning is to control the human-computer interaction module 180 to display the environmental warning level and the predicted environmental data, light up the corresponding indicator light or make the indicator light display the corresponding color, and issue a voice prompt.

[0037] In a possible implementation, the specific training method of the environment prediction model may be, but is not limited to, the following methods: First, a second training set is obtained; wherein the second training set includes a plurality of environmental data; Then, each environmental data in the second training set is input into the environmental prediction model to obtain the predicted environmental data corresponding to each environmental data; Next, based on the predicted environmental data corresponding to each environmental data and the labeling results of the environmental data, the second loss function value is determined; wherein the labeling results of the environmental data are the environmental data at a set time point; the set time point is a time point after the current time and separated from the current time by a preset time period.

[0038] Finally, based on the second loss function value, the model parameters of the environment prediction model are updated.

[0039] In a specific implementation, the second loss function can be one of a mean square error function, a root mean square error function, and a mean absolute error function. The second loss function value output by the second loss function can evaluate the degree of difference between the predicted environmental data output by the environmental prediction model and the labeled result of the environmental data. The smaller the second loss function value, the higher the prediction accuracy of the environmental prediction model. Based on the second loss function value, determine whether the second loss function value is less than the second preset threshold; wherein the second preset threshold can be set according to actual needs. If the second loss function value is not less than the preset threshold, the model parameters of the environmental prediction model are updated and retrained until the second loss function value is less than the preset threshold to obtain the final environmental prediction model.

[0040] In a specific implementation, the valve module 140 in the gas welding control terminal has a variety of structures to achieve its functions, see Figure 6 As shown, the valve module 140 at least includes: a high torque reduction motor 141, a valve drive circuit 142 and a safety valve 143; The input end of the valve drive circuit 142 is connected to the control module, and the output end of the valve drive circuit 142 is connected to the input end of the high torque reduction motor 141; the safety valve 143 is arranged on the gas supply pipeline of the gas source in the gas welding equipment, and the control end of the valve is connected to the high torque reduction motor 141 in a transmission manner; The valve driving circuit 142 is used to receive a valve holding control instruction or a valve closing control instruction, and convert the valve holding control instruction or the valve closing control instruction into a corresponding motor driving signal; The high torque reduction motor 141 is used to drive the safety valve 143 to open or close under the control of the motor drive signal; The safety valve 143 is used to connect or cut off the gas supply pipeline of the gas source in the gas welding equipment.

[0041] exist Figure 6 In the valve module 140 of the gas welding control terminal shown, the valve drive circuit 142 converts the valve holding control instruction or the valve closing control instruction into a corresponding motor drive signal, and transmits the motor drive signal to the high torque reduction motor 141. The high torque reduction motor 141 drives the safety valve 143 to open or close under the control of the motor drive signal, so that the safety valve 143 cuts off or connects the corresponding gas supply pipeline. The safety valve 143 remains in an open state during normal use. The number of safety valves 143 is at least one. One safety valve 143 can be set on each gas supply pipeline, or the safety valve 143 can be set only on the gas supply pipeline connecting the inert gas source or oxygen gas source and the electric welder. In order to realize the integrated setting of the gas source control device, the safety valve 143 is generally set at a position after the pressure reducing valve on the gas supply pipeline connecting the inert gas source or oxygen gas source and the electric welder in the gas welding equipment.

[0042] For details, see Figure 6 As shown, the valve driving circuit may include: a motor driving chip U1, a motor interface J1, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8; The first input terminal and the second input terminal of the motor driving chip U1 are connected to the control module 120 respectively, the first output terminal of the motor driving chip U1 is connected to the first terminal of the motor interface J1, and the second output terminal of the motor driving chip U1 is connected to the second terminal of the motor interface J1; A first end of the fifth resistor R5 is connected to the third end of the motor interface J1, a second end of the fifth resistor R5 is connected to a first end of the sixth resistor R6 and the control module 120 respectively; a second end of the sixth resistor R6 is connected to the ground; The first end of the seventh resistor R7 is connected to the fourth end of the motor interface J1, the second end of the seventh resistor R7 is connected to the first end of the eighth resistor R8 and the control module 120 respectively; the second end of the eighth resistor R8 is connected to the ground.

[0043] exist Figure 6 In the valve module of the gas welding control terminal shown, the motor drive chip U1 is used to convert the valve holding control instruction or valve closing control instruction generated by the control module into a corresponding motor drive signal. The motor interface J1 is used to realize the electrical connection and signal transmission between the high torque reduction motor and the control module. The fifth resistor R5 and the sixth resistor R6 are used to adjust the voltage input to the control module, and the seventh resistor R7 and the eighth resistor R8 are used to adjust the voltage input to the control module.

[0044] In a specific implementation, the communication module in the gas welding control terminal has a variety of structures to achieve its functions, and the communication module at least includes: a wired communication module and / or a wireless communication module; The wired communication module includes a serial communication circuit or a parallel communication circuit; the wired communication module is used to transmit data between the gas welding control terminal and the external device in a wired communication manner; The wireless communication module includes at least one of a ZigBee circuit, a WIFI circuit, a 4G circuit, a 5G circuit, an NFC circuit, a Bluetooth circuit and a radio frequency identification circuit; the wireless communication module is used to transmit data between the gas welding control terminal and an external device by wireless communication.

[0045] In specific implementation, the wireless communication module in the gas welding control terminal has a variety of structures to realize its functions, see Figure 6 As shown, the wireless communication module is introduced by taking the communication module 110 including a 4G circuit as an example. The 4G circuit at least includes: a communication chip 111, an antenna circuit 112, an eSIM card circuit 113 and a level conversion circuit 114; A first end of the communication chip 111 is connected to the antenna circuit 112, a second end of the communication chip 111 is connected to the eSIM card circuit 113, a third end of the communication chip 111 is connected to a first end of the level conversion circuit 114; a second end of the level conversion circuit 114 is connected to the control module 120; The communication chip 111 is used to process the signal received by the antenna circuit 112 and transmit the processed signal to the level conversion circuit 114; it is also used to process the signal received by the level conversion circuit 114 and transmit the processed signal to the antenna circuit 112; The antenna circuit 112 is used to receive signals sent by external devices and also to send signals to external devices; The eSIM card circuit 113 is used to provide the communication chip 111 with identity information for accessing the network; The level conversion circuit 114 is used to perform level conversion between the communication chip 111 and the control module 120 .

[0046] exist Figure 6 In the air source control device shown, the communication chip 111 is mainly responsible for receiving, sending and converting signals. The communication chip 111 can send instructions to the antenna circuit 112 to instruct it to receive or send signals of a specific frequency and decode and process the received signals.

[0047] For specific implementation, see Figure 7 As shown, the antenna circuit includes: a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a ninth resistor R9, a fifth capacitor C5 and a 4G antenna; The first end of the first inductor L1 is connected to the first end of the 4G antenna, and the second end of the first inductor L1 is connected to the first end of the ninth resistor R9; the first end of the second inductor L2 is connected to the second end of the 4G antenna, and the second end of the second inductor L2 is connected to the first end of the ninth resistor R9; the first end of the third inductor L3 is connected to the third end of the 4G antenna, and the second end of the third inductor L3 is connected to the first end of the ninth resistor R9; the second end of the ninth resistor R9 is respectively connected to the first end of the fifth capacitor C5 and the communication chip; the second end of the fifth capacitor C5 is connected to the ground; the first end of the fourth inductor L4 is connected to the first end of the ninth resistor R9, and the second end of the fourth inductor L4 is connected to the second end of the fifth capacitor C5.

[0048] For specific implementation, see Figure 8As shown, the eSIM card circuit includes: a tenth resistor R10, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a first TVS diode D1, a second TVS diode D2, a third TVS diode D3, a fourth TVS diode D4 and an eSIM card; the vcc end of the eSIM card is connected to the USIM1-VDD end of the communication chip; the rst end of the eSIM card is connected to the USIM1-RST end of the communication chip; the clk end of the eSIM card is connected to the USIM1-CLK end of the communication chip; the i / o end of the eSIM card is connected to the USIM1-DATA end of the communication chip; the gnd end of the eSIM card is connected to the ground; the first end of the first TVS diode D1 and the first end of the sixth capacitor C6 are both connected to the i / o end of the eSIM card, and the first TV The second end of the S diode D1 and the second end of the sixth capacitor C6 are both connected to the ground; the first end of the second TVS diode D2 and the first end of the seventh capacitor C7 are both connected to the rst end of the eSIM card, and the second end of the second TVS diode D2 and the second end of the seventh capacitor C7 are both connected to the ground; the first end of the third TVS diode D3 and the first end of the eighth capacitor C8 are both connected to the clk end of the eSIM card, and the second end of the third TVS diode D3 and the second end of the eighth capacitor C8 are both connected to the ground; the first end of the tenth resistor R10 is connected to the i / o end of the eSIM card, and the second end of the tenth resistor R10 is respectively connected to the vcc end of the eSIM card, the first end of the ninth capacitor C9 and the first end of the fourth TVS diode D4, and the second end of the ninth capacitor C9 and the second end of the fourth TVS diode D4 are connected to the ground.

[0049] For specific implementation, see Fig. 9As shown, the level conversion circuit includes: an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a second triode P2 and a third triode P3; the emitter of the second triode P2 is connected to the TXD end of the control module via the eleventh resistor R11, the collector of the second triode P2 is connected to the MAINRXD end of the communication chip via the twelfth resistor R12, the collector of the second triode P2 is also connected to the first RESERVED end of the communication chip via the thirteenth resistor R13, and the base of the second triode P2 is connected to the first end of the fifteenth resistor R15 via the fourteenth resistor R14; the fifteenth resistor R15 The second end of the sixteenth resistor R16 is connected to the USB-BOOT end of the communication chip; the first end of the sixteenth resistor R16 is connected to the collector of the second transistor P2, and the second end of the sixteenth resistor R16 is connected to the first end of the fifteenth resistor R15; the emitter of the third transistor P3 is connected to the MAINTXD end of the communication chip via the seventeenth resistor R17, and the emitter of the third transistor P3 is also connected to the second RESERVED end of the communication chip via the eighteenth resistor R18, the collector of the third transistor P3 is connected to the RXD end of the control module via the nineteenth resistor R19, and the base of the third transistor P3 is connected to the first end of the fifteenth resistor R15 via the twentieth resistor R20; the first end of the twenty-first resistor R21 is connected to the collector of the third transistor P3, and the first end of the twenty-first resistor R21 is connected to the output end VDD3 of the second power supply circuit.

[0050] In a possible implementation, the power supply end of the communication chip is connected to the first power supply circuit via a power supply filter circuit, wherein the power supply filter circuit includes a plurality of capacitors and a first voltage regulator diode, wherein the plurality of capacitors include two electrolytic capacitors and a plurality of non-polar capacitors; Fig.10As shown, the power supply filter circuit includes: a first electrolytic capacitor Ci1, a second electrolytic capacitor Ci2, a first non-polar capacitor Ci3, a second non-polar capacitor Ci4, a third non-polar capacitor Ci5, a fourth non-polar capacitor Ci6, a fifth non-polar capacitor Ci7, a sixth non-polar capacitor Ci8 and a first voltage zener diode D5; wherein, the first end of the first non-polar capacitor Ci3, the second non-polar capacitor Ci4, the third non-polar capacitor Ci5, the fourth non-polar capacitor Ci6, the fifth non-polar capacitor Ci7 and the sixth non-polar capacitor Ci8 is connected to the positive terminal of the first electrolytic capacitor Ci1, and the first non-polar capacitor Ci3, the second non-polar capacitor Ci4, the third non-polar capacitor Ci5, the fourth non-polar capacitor Ci6, the fifth non-polar capacitor Ci7 and the sixth non-polar capacitor Ci8 are ... The second ends of the three non-polar capacitors Ci5, the fourth non-polar capacitor Ci6, the fifth non-polar capacitor Ci7 and the sixth non-polar capacitor Ci8 are connected to the negative terminal of the first electrolytic capacitor Ci1; the positive terminal of the first electrolytic capacitor Ci1 is connected to the output terminal VDD2 of the first power supply circuit, and the negative terminal of the first electrolytic capacitor Ci1 is connected to the ground; the negative terminal of the first voltage zener diode D5 is connected to the output terminal VDD2 of the first power supply circuit, and the positive terminal of the first voltage zener diode D5 is connected to the ground; the positive terminal of the second electrolytic capacitor Ci2 is respectively connected to the positive terminal of the first electrolytic capacitor Ci1 and the VBAT terminal of the communication chip, and the negative terminal of the second electrolytic capacitor Ci2 is connected to the ground.

[0051] In one possible implementation, see Fig.11 As shown, the communication module also includes: a communication interface circuit; The communication interface circuit includes a USB interface, a main voltage regulator diode D6 and a main TVS diode D7; The first end of the USB interface is connected to the communication chip; the positive terminal of the main voltage zener diode D6 is connected to the power supply end of the USB interface, and the negative terminal of the main voltage zener diode D6 is connected to the internal power supply; the first end of the main TVS diode D7 is connected to the positive terminal of the main voltage zener diode D6, and the second end of the main TVS diode D7 is connected to the ground.

[0052] exist Fig.11 In the air source control device shown, the main voltage regulator diode D6 and the main TVS diode D7 are used to protect the USB interface and prevent the USB interface from being impacted by overvoltage.

[0053] In a possible implementation, the human-computer interaction module includes an indication circuit and a key circuit; the indication circuit and the key circuit are respectively connected to the control module; The indicating circuit is used to indicate the working state of the gas welding control terminal, which includes the communication state, the power state and the valve state in the valve module; The key circuit is used to trigger the control module to control the operating state of the gas welding control terminal, and the operating state includes power on, power off and reset.

[0054] In practical applications, the indication circuit may include an audible alarm circuit and an LED indication circuit, see Fig.12 As shown, the sound and light alarm module includes a sound alarm circuit and an LED indication circuit.

[0055] The sound alarm circuit includes a twenty-second resistor R22, a twenty-third resistor R23, a fourth transistor P4, a first diode D8 and a buzzer; the emitter of the fourth transistor P4 is connected to the ground, the fourth transistor P4 is connected to the control module via the twenty-second resistor R22, the collector of the fourth transistor P4 is respectively connected to the positive terminal of the first diode D8 and the second terminal of the buzzer; the negative terminal of the first diode D8 is respectively connected to the output terminal VDD3 of the second power supply circuit and the first terminal of the buzzer; the third terminal of the buzzer is connected to the ground; the first terminal of the twenty-third resistor R23 is connected between the control module and the twenty-second resistor R22, and the second terminal of the twenty-third resistor R23 is connected to the emitter of the fourth transistor P4. When the received environmental data or working data exceeds the preset threshold range, the control module controls the fourth transistor to be turned on so that the buzzer generates a sound alarm.

[0056] The LED indication circuit includes a battery power indication circuit, a network status indication circuit and a safety valve status indication circuit. The battery power indication circuit includes a fifth transistor P5, a first light-emitting diode LED1, a twenty-fourth resistor R24, a twenty-fifth resistor R25 and a twenty-sixth resistor R26. The emitter of the fifth transistor P5 is connected to the ground, the base of the fifth transistor P5 is connected to the control module via the twenty-fourth resistor R24, the collector of the fifth transistor P5 is connected to the negative terminal of the first light-emitting diode LED1, and the positive terminal of the first light-emitting diode LED1 is connected to the output terminal VDD2 of the first power supply circuit via the twenty-fifth resistor R25; the first end of the twenty-sixth resistor R26 is connected to the emitter of the fifth transistor P5, and the second end of the twenty-sixth resistor R26 is connected to the base of the fifth transistor P5. When the input detection voltage received by the control module is lower than the preset threshold, the fifth transistor is turned on to light up the first light-emitting diode, and the first light-emitting diode is lit corresponding to the state of low battery power.

[0057] The network status indication circuit includes a sixth transistor P6, a second light emitting diode LED2, a twenty-seventh resistor R27, a twenty-eighth resistor R28 and a twenty-ninth resistor R29. The emitter of the sixth transistor P6 is connected to the ground, the base of the sixth transistor P6 is connected to the control module via the twenty-seventh resistor R27, the collector of the sixth transistor P6 is connected to the negative terminal of the second light emitting diode LED2, and the positive terminal of the second light emitting diode LED2 is connected to the output terminal VDD3 of the second power supply circuit via the twenty-eighth resistor R28; the first end of the twenty-ninth resistor R29 is connected to the emitter of the sixth transistor P6, and the second end of the twenty-ninth resistor R29 is connected to the base of the sixth transistor P6. When the data interaction between the communication module and the control module is abnormal, the control module controls the sixth transistor to be turned on so that the second light emitting diode is lit, and the second light emitting diode is lit corresponding to the state of abnormal data interaction between the communication module and the control module.

[0058] The motor state indicating circuit includes a seventh transistor P7, a third light emitting diode LED3, a thirtieth resistor R30 and a thirty-first resistor R31. The base of the seventh transistor P7 is connected to the control module, the collector of the seventh transistor P7 is connected to the ground, and the emitter of the seventh transistor P7 is connected to the negative terminal of the third light emitting diode LED3; the positive terminal of the third light emitting diode LED3 is connected to the output terminal VDD3 of the second power supply circuit via the thirtieth resistor R30; the first end of the thirty-first resistor R31 is connected to the collector of the seventh transistor P7, and the second end of the thirty-first resistor R31 is connected to the base of the seventh transistor P7.

[0059] Based on the same concept, the present application also provides a gas welding system, see Fig.13 As shown, the gas welding system 200 includes: a user end 210, a gas welding device, a cloud server 220 and the above-mentioned gas welding control terminal 100; the cloud server is respectively connected to the user end and the gas welding control terminal for communication; the gas welding control terminal is arranged on the gas supply pipeline of the gas source in the gas welding device; The user terminal 210 is used to receive the qualification information input by the user and send the qualification information to the cloud server; it is also used to establish a communication connection with the gas welding control terminal 100 by sending a communication establishment request after receiving the audit result of the permission verification, and send a start instruction to the gas welding control terminal 100; The cloud server 220 is used to receive and verify the qualification information, and when the qualification information is verified to be valid, send the review result of the permission verification to the user terminal 210; Gas welding equipment, used to perform gas welding operations after connecting to a gas source; wherein the gas welding equipment comprises a gas welding gun and a gas source connected by a gas supply pipeline; The gas welding control terminal 100 is used to receive a communication establishment request sent by the user terminal 210 and establish a communication connection with the user terminal 210; after receiving the start instruction, it starts to collect environmental data at the monitoring point in the gas welding equipment in real time, and connects or cuts off the gas supply pipeline of the gas source in the gas welding equipment; determines the operating status parameters of the electric welding equipment according to the environmental data, and when the operating status parameters are within the standard state, connects the gas supply pipeline of the gas source in the gas welding equipment; when the operating status parameters are within the standard state, cuts off the gas supply pipeline of the gas source in the gas welding equipment.

[0060] In practical applications, the user end may be a handheld data terminal. The qualification information input by the user includes at least one of a fire order, a welder special operation operation certificate, a welder grade qualification certificate, and a unit qualification. The cloud server may determine whether the qualification information is valid based on the information stored in the system. If the qualification information is valid, the audit result is determined to be a permission verification pass; if the qualification information is invalid, the audit result is determined to be a permission verification failure. The cloud server will synchronize the audit result to the user end. After the user end receives the audit result of the permission verification failure, the display interface of the user end will jump to the prompt interface of the permission verification failure. After the user end receives the audit result of the permission verification passing, the display interface of the user end will jump to the operation interface, in which the user can enter the device identification information or the user scans the QR code on the gas welding control terminal to generate a corresponding communication request to send to the gas welding control terminal. When the identification information in the communication request is the same as the identification information of the gas welding control terminal, the control module of the gas welding control terminal controls the communication module of the gas welding control terminal to establish a communication connection with the user end. After the user end establishes a communication connection with the gas welding control terminal, the user end can send a start command to control the gas welding control terminal to start data collection and control the gas supply pipeline of the gas source in the gas welding equipment. The user end can send a pipeline opening command or a pipeline closing command to enable the gas welding control terminal to connect or close the gas supply pipeline by changing the state of its own valve.

[0061] In specific implementation, the gas welding control terminal can upload the opening or closing status of the valve module, the collected environmental information and other information by establishing a communication connection with the user end and the cloud server. The gas welding control terminal can directly communicate with the cloud server through the internal communication module to upload information; it can also be forwarded to the server through the user end to upload information. The user end is wirelessly connected to the cloud server. The gas welding control terminal and the user end can communicate wirelessly through the communication module. Under the premise that the control module of the gas welding control terminal has Bluetooth function, the gas welding control terminal can communicate with the user end through the control module.

[0062] Note that although several units or subunits of the device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided into multiple units to be embodied.

[0063] In addition, although the operations of the method of the present application are described in a specific order in the drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0064] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0065] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A gas welding control terminal, characterized in that: include: A communication module, a control module, a data acquisition module and a valve module; the control module is electrically connected to the data acquisition module, the communication module and the valve module of the gas welding equipment respectively; the communication module is in communication connection with the cloud server; The communication module is used to receive a communication establishment request sent by the user end, and send the communication establishment request to the control module; wherein the communication establishment request is an instruction generated by the user end after passing the authority verification of the cloud server for establishing a communication connection with the gas welding control terminal; and is also used to receive a start instruction sent by the user end, and send the start instruction to the control module; The control module is used to establish a communication connection with the user end after receiving the communication establishment request instruction; and is also used to control the data acquisition module to start data acquisition after receiving the start instruction, and control the valve module to connect the gas supply pipeline of the gas source in the gas welding equipment; and receive the environmental data of the gas welding equipment monitoring point sent by the data acquisition module, determine the operating state parameters of the electric welding equipment according to the environmental data, and send a valve holding control instruction to the valve module when the operating state parameters are in a state of not exceeding the standard, and send a valve closing control instruction to the valve module when the operating state parameters are in a state of exceeding the standard; The data acquisition module is used to collect the environmental data of the monitoring point of the gas welding equipment in real time, and send the collected environmental data to the control module; The valve module is used to connect the gas supply pipeline of the gas source in the gas welding equipment when receiving the valve holding control instruction sent by the control module; and is used to cut off the gas supply pipeline of the gas source in the gas welding equipment when receiving the valve closing control instruction sent by the control module.

2. The gas welding control terminal according to claim 1, characterized in that: The control module is specifically used for: Input the current environmental threshold and the environmental data in the preset time period before the current time into the environmental threshold correction model, and obtain the correction amount corresponding to the current environmental threshold output by the environmental threshold correction model; wherein the current environmental threshold is the preset initial threshold when the correction is made for the first time, and the current environmental threshold is the target environmental threshold corresponding to the previous preset time period when the correction is not made for the first time; Adjust the current environment threshold according to the correction amount to obtain a target environment threshold; Determining whether the environmental data exceeds a target environmental threshold; If yes, it is determined that the operating state parameter of the gas welding equipment is in an over-standard state, and a valve shut-off control instruction is generated and sent to the valve module; If not, it is determined that the operating state parameters of the gas welding equipment are within the standard state, and a valve holding control instruction is generated and sent to the valve module.

3. The gas welding control terminal according to claim 2, characterized in that: The data acquisition module includes: a temperature and humidity acquisition circuit and a combustible gas acquisition circuit; The temperature and humidity acquisition circuit comprises: at least one temperature and humidity sensor; the output end of each temperature and humidity sensor is respectively connected to the control module; the power supply end of each temperature and humidity sensor is respectively connected to the output end of the second power supply circuit; each temperature and humidity sensor is arranged at each monitoring point of the gas welding equipment; the temperature and humidity acquisition circuit is used to collect ambient temperature data and ambient humidity data, and send each ambient temperature data and ambient humidity data to the control module; The combustible gas acquisition circuit includes: a combustible gas sensor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor and a first capacitor; the first end of the combustible gas sensor is connected to the output end of the first power supply circuit, the second end of the combustible gas sensor is connected to the collector of the first transistor, the third end of the combustible gas sensor is connected to the second power supply circuit via the first resistor, and the fourth end of the combustible gas sensor is respectively connected to the control module, the first end of the second resistor and the first end of the first capacitor; the second end of the second resistor and the second end of the first capacitor are both connected to the ground; the base of the first transistor is respectively connected to the control module and the first end of the fourth resistor via the third resistor, and the emitter of the first transistor is respectively connected to the ground and the second end of the fourth resistor; the combustible gas acquisition circuit is used to collect combustible gas concentration data and send the combustible gas concentration data to the control module.

4. The gas welding control terminal according to claim 2, characterized in that: Also includes: Power control module; The input end of the power control module is electrically connected to the internal power supply, the output end of the power control module is electrically connected to the first power supply circuit, and the control end of the power control module is electrically connected to the control module; the power control module is used to connect or disconnect the internal power supply and the gas welding control terminal; The data acquisition module also includes: a power supply voltage acquisition circuit; The power supply voltage acquisition circuit comprises: at least one first voltage-dividing resistor, at least one second voltage-dividing resistor, a third capacitor and a fourth capacitor; the first end of each of the first voltage-dividing resistors is connected to the internal power supply, and the second end of each of the first voltage-dividing resistors is connected to the voltage detection end; the first end of each of the second voltage-dividing resistors is connected to the voltage detection end, and the second end of each of the second voltage-dividing resistors is connected to the ground; the first end of the third capacitor is connected to the internal power supply, and the second end of the third capacitor is connected to the ground; the first end of the fourth capacitor is connected to the voltage detection end, and the second end of the fourth capacitor is connected to the ground; the power supply voltage acquisition circuit is used to collect the power supply voltage data input from the internal power supply to the gas welding control terminal, and send the power supply voltage data to the control module; The control module is used to receive the power supply voltage data, and when the power supply voltage data is lower than a preset first voltage threshold, control the power supply control module to cut off the connection between the internal power supply and the gas welding control terminal.

5. The gas welding control terminal according to any one of claims 1 to 4, characterized in that: Also includes: Human-computer interaction module; The human-computer interaction module is electrically connected to the control module; the human-computer interaction module is used to receive the early warning instruction sent by the control module and execute the early warning operation corresponding to the early warning instruction; The control module is further configured to input current environmental data into the environmental prediction model to obtain predicted environmental data output by the environmental prediction model; based on a preset environmental warning level and a threshold range corresponding to the environmental warning level, determine the environmental warning level corresponding to the threshold range to which the predicted environmental data belongs as the target environmental warning level; Based on the correspondence between the environmental warning level and the warning instruction, a warning instruction corresponding to the target environmental warning level is sent to the human-computer interaction module.

6. The gas welding control terminal according to claim 5, characterized in that: The valve module includes: a high-torque reduction motor, a valve drive circuit and a safety valve; The input end of the valve drive circuit is connected to the control module, and the output end of the valve drive circuit is connected to the input end of the high torque reduction motor; the safety valve is arranged on the gas supply pipeline of the gas source in the gas welding equipment, and the control end of the valve is drivingly connected to the high torque reduction motor; The valve driving circuit is used to receive the valve holding control instruction or the valve closing control instruction, and convert the valve holding control instruction or the valve closing control instruction into a corresponding motor driving signal; The high torque reduction motor is used to drive the safety valve to open or close under the control of the motor drive signal; The safety valve is used to connect or cut off the gas supply pipeline of the gas source in the gas welding equipment.

7. The gas welding control terminal according to claim 6, characterized in that: The valve driving circuit comprises: a motor driving chip, a motor interface, a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor; The first input terminal and the second input terminal of the motor driving chip are connected to the control module respectively, the first output terminal of the motor driving chip is connected to the first terminal of the motor interface, and the second output terminal of the motor driving chip is connected to the second terminal of the motor interface; The first end of the fifth resistor is connected to the third end of the motor interface, the second end of the fifth resistor is connected to the first end of the sixth resistor and the control module respectively; the second end of the sixth resistor is connected to the ground; The first end of the seventh resistor is connected to the fourth end of the motor interface, the second end of the seventh resistor is connected to the first end of the eighth resistor and the control module respectively; the second end of the eighth resistor is connected to the ground.

8. The gas welding control terminal according to claim 7, characterized in that: The human-computer interaction module includes an indication circuit and a key circuit; the indication circuit and the key circuit are respectively connected to the control module; The indicating circuit is used to indicate the environmental warning level and working status of the gas welding control terminal, and the working status includes the communication status, the power status and the valve status in the valve module; The key circuit is used to trigger the control module to control the operating state of the gas welding control terminal, and the operating state includes power on, power off and reset.

9. The gas welding control terminal according to claim 8, characterized in that: The communication module includes: a wired communication module and / or a wireless communication module; The wired communication module includes a serial communication circuit or a parallel communication circuit; the wired communication module is used to transmit data between the gas welding control terminal and the external device in a wired communication manner; The wireless communication module includes at least one of a ZigBee circuit, a WIFI circuit, a 4G circuit, a 5G circuit, an NFC circuit, a Bluetooth circuit and a radio frequency identification circuit; the wireless communication module is used to transmit data between the gas welding control terminal and an external device in a wireless communication manner.

10. A gas welding system, characterized in that: include: A user end, a gas welding device, a cloud server, and a gas welding control terminal as described in any one of claims 1 to 9; the cloud server is respectively connected to the user end and the gas welding control terminal for communication; the gas welding control terminal is arranged on a gas supply pipeline of a gas source in the gas welding device; The user terminal is used to receive the qualification information input by the user and send the qualification information to the cloud server; It is also used to establish a communication connection with the gas welding control terminal by sending a communication establishment request after receiving the audit result of passing the authority verification, and send a start instruction to the gas welding control terminal; The cloud server is used to receive and verify the qualification information, and when the qualification information is verified to be valid, send a review result of the permission verification to the user end; The gas welding equipment is used to perform gas welding operations after connecting to a gas source; wherein the gas welding equipment comprises a gas welding gun and a gas source connected by a gas supply pipeline; The gas welding control terminal is used to receive a communication establishment request sent by the user end and establish a communication connection with the user end; after receiving the start instruction, it starts to collect environmental data at a monitoring point in the gas welding equipment in real time, and connects or cuts off the gas supply pipeline of the gas source in the gas welding equipment; determines the operating status parameters of the electric welding equipment according to the environmental data, and connects the gas supply pipeline of the gas source in the gas welding equipment when the operating status parameters are within the standard state, and cuts off the gas supply pipeline of the gas source in the gas welding equipment when the operating status parameters are beyond the standard state.

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