A welding machine data acquisition and transmission method and system

Abstract

The application discloses a welding machine data acquisition and transmission method, which comprises the following steps: collecting welding machine data of a source node as source node data and collecting welding machine data output by an acquisition module as target node data; determining a data transmission offset according to the source node data and the target node data; determining final acquisition data according to the target node data and the data transmission offset; and adjusting the transmission power of the acquisition module according to a transmission power self-adaptive adjustment algorithm and transmitting the final acquisition data to an external terminal. The final acquisition data is determined according to the data transmission offset, so that the interference caused by noise can be removed, and the accuracy and stability of welding machine data detection are ensured. Moreover, the transmission power of the wireless communication module of the acquisition module can be adjusted by the transmission power self-adaptive adjustment method, so that the power consumption can be reduced while the welding machine data transmission quality is ensured.

Description

Technical Field

[0001] This invention relates to the field of data acquisition technology, specifically to a method for acquiring and transmitting welding machine data. Background Technology

[0002] A welding machine is a mechanical device that uses a high-temperature electric arc generated when the positive and negative electrodes are short-circuited momentarily to melt the welding material on the welding rod and the material being welded, so that the objects in contact are joined together, achieving the purpose of permanently connecting the materials and forming a mechanical device with a given functional structure.

[0003] The welding process of electric welding machines is quite complex. Analyzing their working status and evaluating their welding performance are important means to promote the development of electric welding machine technology.

[0004] Traditionally, the evaluation of the welding process performance of electric welding machines has largely relied on the subjective descriptions and judgments of experienced welding technicians regarding the performance during the welding process, as well as the use of simple, non-specialized general-purpose manual measuring tools as auxiliary means to detect the working process parameters of the electric welding machine.

[0005] Currently, the supervision and management of production lines by welding manufacturing companies both domestically and internationally is mainly limited to the on-site workshop control level. Many welding statuses, parameters, alarm information, etc., can only be obtained on-site, which greatly reduces the production efficiency of manufacturing companies and reduces the real-time and reliability of management.

[0006] In response to this situation, more and more companies are choosing to add modules with data acquisition functions to their welding machines to facilitate workshop management and product process traceability.

[0007] However, due to the limited internal space of the welding machine, it is impossible to install conventional data modules later, which makes later maintenance inconvenient and greatly reduces the practicality and reliability of conventional data modules.

[0008] Furthermore, the welding machine operating environment has problems such as multiple noise sources, strong interference, and great influence from load. Conventional data modules are easily affected by environmental factors, resulting in large errors, low efficiency, and long cycles in data acquisition using conventional data modules, which cannot guarantee the accuracy and stability of welding machine data acquisition. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to realize a method and system that can ensure stable and reliable data acquisition and transmission of welding machines.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is: a welding machine data acquisition and transmission method, comprising the following steps:

[0011] Step 1: Use the welding machine as the source node and the acquisition module as the target node. The source node and the target node detect the welding machine data information respectively. When the target node sends a request data frame, the source node transmits the welding machine data information frame to the target node.

[0012] Step 2: Use the welding machine data collected by the source node as the source node data, and use the welding machine data output by the acquisition module as the target node data. Determine the data transmission offset based on the source node data and the target node data.

[0013] Step 3: Determine the final collected data based on the target node data and the data transmission offset;

[0014] Step 4: Adjust the transmission power of the acquisition module according to the adaptive transmission power adjustment algorithm, and transmit the final acquired data to the external terminal.

[0015] In step 2, the method for the acquisition module to output target node data includes the following steps:

[0016] 1) Establish a minimum periodic information sampling interval, and the acquisition module continuously performs sampling;

[0017] 2) The first acquisition unit and the second acquisition unit in the acquisition module perform initial sampling synchronously, and the first acquisition unit and the third acquisition unit in the acquisition module perform re-sampling synchronously, with the initial sampling and re-sampling performed at intervals.

[0018] 3) Perform mean averaging on the initial sampled data to obtain the initial mean sampled data, and perform mean averaging on the resampled data to obtain the remean sampled data;

[0019] 4) Perform mean-averaging on the initial and subsequent sampled data to obtain the target node data.

[0020] In step 4, the adaptive transmission power adjustment method includes the following steps:

[0021] 1) After the target node sends a request data frame, the source node transmits an information frame to the target node;

[0022] 2) After receiving the corresponding data, the source node and the target node obtain the received signal strength of the link and determine the received signal strength RSS I1 of the source node and the received signal strength RSS I2 of the target node.

[0023] 3) Determine the received signal offset RSS IΔ based on the received signal strength RSS I1 of the source node and the received signal strength RSS I2 of the target node;

[0024] 4) Adjust the transmission power of the acquisition module according to the adaptive transmission power adjustment algorithm.

[0025] The adaptive transmission power adjustment method employs the following calculation method:

[0026] P = RSS IΔ × [RSS I² – RSS I] ref ]+P ref , RSS IΔ=RSS I1–RSS I2,

[0027] in:

[0028] P is the transmission power of the acquisition module (2);

[0029] RSS IΔ is the received signal offset;

[0030] RSS I1 represents the received signal strength at the source node;

[0031] RSS I2 represents the received signal strength at the target node;

[0032] RSS I ref This is a reference value for the received signal strength.

[0033] P ref This is a reference value for transmission power.

[0034] A welding machine data acquisition and transmission system for performing the aforementioned welding machine data acquisition and transmission method includes an acquisition module fixed to the outside of the welding machine via a fixing device. The fixing device includes a fixing plate fixed to the outside of the welding machine, and sliding plates corresponding to both sides of the fixing plate. Clamping members for holding the acquisition module are corresponding to both sides of the sliding plates. The sliding plates can slide relative to the fixing plate via sliding components on both sides of the fixing plate. A cylinder is provided on the fixing plate, and the output end of the cylinder is connected to one side of the sliding plate via a connecting plate. The cylinder can synchronously drive both sliding plates to slide relative to the fixing plate. A linkage component is provided on the fixing plate, and the end of the linkage component is connected to the side of the sliding plate. When one side of the sliding plate moves, the other side of the sliding plate can be driven to move synchronously via the linkage component.

[0035] The clamping component includes an L-shaped connector that is fixedly connected to the slide plate by connecting bolts, and rollers are movably provided on both sides of the L-shaped connector via bearings; the rollers can roll relative to the L-shaped connector and the acquisition module, and the rollers can clamp the acquisition module.

[0036] The linkage component includes a rotating shaft fixed to a fixed plate, a linkage member on the rotating shaft, and the linkage member can rotate relative to the rotating shaft; linkage rods are provided on both sides of the linkage member, and the other end of the linkage rod is fixedly connected to the side of the slide plate.

[0037] The sliding assembly includes a slide rail fixed to a fixed plate and a slider fixed to a sliding plate, and the slider is provided with a groove that engages with the slide rail.

[0038] The first acquisition unit includes a first measurement component connected to the input terminal of the acquisition module; the output terminal of the first measurement component is fixedly connected to the input terminal of a first differential amplifier, and the output terminal of the first differential amplifier is fixedly connected to the input terminal of a filter.

[0039] The second acquisition unit includes a second measurement component connected to the input terminal of the acquisition module, and the output terminal of the second measurement component is fixedly connected to the input terminal of the second differential amplifier; the third acquisition unit includes a third measurement component connected to the input terminal of the acquisition module, and the output terminal of the third measurement component is fixedly connected to the input terminal of the third differential amplifier.

[0040] The welding machine data acquisition and transmission method of the present invention has the following advantages:

[0041] 1. The acquisition module is clamped by a fixing device fixed to the outside of the welding machine, and the acquisition module is integrated into the welding machine system through the CAN bus protocol to obtain the welding parameters when the welding machine is working. This allows for quick installation of the acquisition module, making it easy for people to install the acquisition module outside the welding machine. It can be installed and used in various scenarios, reducing the space pressure inside the welding machine and making it easy to disassemble and assemble the acquisition module. The subsequent maintenance is simple and convenient, greatly improving the practicality and reliability of the acquisition module.

[0042] 2. Determining the final acquired data based on the data transmission offset can eliminate interference caused by noise and ensure the accuracy and stability of welding machine data detection;

[0043] 3. The acquisition module has a wireless transmission function, which can transmit welding machine data to an external terminal for real-time monitoring of welding parameters during welding machine operation. Furthermore, the transmission power of the wireless communication module of the acquisition module can be adjusted through an adaptive transmission power adjustment method, which can reduce power consumption while ensuring the quality of welding machine data transmission, thereby achieving the goal of low power consumption and energy saving. Attached Figure Description

[0044] The following is a brief explanation of the content and markings in each of the accompanying drawings in this specification:

[0045] Figure 1 This is a schematic diagram of the structure of the present invention;

[0046] Figure 2 This is a side view of the present invention;

[0047] Figure 3 This is a schematic diagram of the structure of the fixing device for clamping the acquisition module of the present invention;

[0048] Figure 4 This is a schematic diagram of the specific structure of the fixing device of the present invention;

[0049] Figure 5 This is a schematic diagram of the specific structure of the acquisition module of the present invention;

[0050] Figure 6 This is a schematic diagram of the specific structure of the acquisition unit inside the acquisition module of the present invention;

[0051] Figure 7 This is a schematic diagram of the sampling module of the present invention;

[0052] Figure 8 This is a flowchart of the present invention;

[0053] The markings in the above figures are all:

[0054] 1. Welding machine; 2. Data acquisition module; 3. Fixing device;

[0055] 11. Fixed plate; 12. Slide plate; 13. Clamping component; 14. Sliding assembly; 15. Cylinder; 16. Connecting plate; 17. Linkage assembly;

[0056] 131. Connecting bolt; 132. L-shaped connector; 133. Bearing; 134. Roller;

[0057] 141. Slide rail; 142. Slider; 143. Slide groove;

[0058] 171. Rotating shaft; 172. Linkage component; 173. Linkage rod;

[0059] 21. First acquisition unit; 22. Second acquisition unit; 23. Third acquisition unit;

[0060] 211. First measuring component; 212. First differential amplifier; 213. Filter;

[0061] 221. Second measuring component; 222. Second differential amplifier;

[0062] 231. Third acquisition unit; 232. Third differential amplifier. Detailed Implementation

[0063] The following description, with reference to the accompanying drawings, details the specific implementation of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the function and working principle of each part, the manufacturing process, and the operation and use methods, to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0064] This invention provides, for example Figure 1The welding machine data acquisition and transmission method shown includes the following steps:

[0065] Step 1: The acquisition module 2 is fixed to the outside of the welding machine 1 by the fixing device 3 set on the welding machine 1. A clamping plate is set at the bottom of the acquisition module 2. The fixing device 3 set on the outside of the welding machine 1 can clamp the four corners of the clamping plate to realize the quick installation of the acquisition module 2.

[0066] In this invention, the acquisition module 2 is integrated into the welding machine 1 system via the CAN bus protocol, and is connected to the power supply transformer and communication circuit board of the welding machine 1 respectively via communication lines to acquire welding parameters such as the working current and voltage of the welding machine 1.

[0067] like Figure 1 As shown, in this invention, the acquisition module 2 is clamped by the fixing device 3 fixed to the outside of the welding machine 1, and the acquisition module 2 is integrated into the welding machine 1 system through the CAN bus protocol to obtain the welding parameters when the welding machine 1 is working. This enables the rapid installation of the acquisition module 2, making it convenient for people to install the acquisition module 2 outside the welding machine 1. It can be installed and used in various scenarios, reducing the space pressure inside the welding machine 1, and making it easy to disassemble and assemble the acquisition module 2. The subsequent maintenance is simple and convenient, greatly improving the practicality and reliability of the acquisition module 2.

[0068] Step 2: In this invention, since the internal data of the welding machine 1 is obtained through the acquisition module 2, the welding machine 1 is used as the source node and the acquisition module 2 is used as the target node.

[0069] Step 3: The source node and the target node respectively detect the data information of welding machine 1. When the target node sends a request data frame, the source node transmits the data information frame of welding machine 1 to the target node.

[0070] Specifically, the data acquisition module 2 outputs target node data through the following steps:

[0071] Step 31: Establish the minimum periodic information sampling interval, and the acquisition module 2 continuously performs sampling.

[0072] The minimum periodic information sampling interval is related to the sampling points. The more sampling points per second, the higher the curve reproduction accuracy. The data sampled by the acquisition module 2 must include the maximum value data, average value data, and minimum value data. Therefore, the minimum periodic information sampling interval can be adjusted according to the actual situation.

[0073] Step 32: The first acquisition unit 21 and the second acquisition unit 22 in the acquisition module 2 perform initial sampling simultaneously, and the first acquisition unit 21 and the third acquisition unit 23 in the acquisition module 2 perform re-sampling simultaneously, with the initial sampling and re-sampling performed at intervals.

[0074] like Figure 7 As shown, in this invention, the initial sampling is performed by the first acquisition unit 21 and the second acquisition unit 22 simultaneously, and the subsequent sampling is performed by the first acquisition unit 21 and the third acquisition unit 23 simultaneously.

[0075] In this invention, by performing initial sampling and resampling in stages, the impact of data fluctuations during the sampling interval on the detection results of the target node data can be prevented.

[0076] Step 33: Perform a mean operation on the initial sampled data to obtain the initial mean sampled data, and perform a mean operation on the resampled data to obtain the remean sampled data;

[0077] Step 34: Perform a mean operation on the initial mean-sampled data and the second mean-sampled data to obtain the target node data.

[0078] In this invention, since a first acquisition unit 21, a second acquisition unit 22 and a third acquisition unit 23 are set up, the internal data of the welding machine 1 is obtained through three acquisition units. Although the sampling of the filter 213 will improve the accuracy of the data detection of the welding machine 1, the sampling of the filter 213 will also reduce the speed of the data detection of the welding machine 1 accordingly.

[0079] Therefore, in this invention, the first acquisition unit 21 and the second acquisition unit 22 are sampled simultaneously during the initial sampling, and the first acquisition unit 21 and the third acquisition unit 23 are sampled simultaneously during the subsequent sampling. The initial sampling data and the subsequent sampling data are then averaged, and the initial averaged sampling data and the subsequent averaged sampling data are then averaged again to obtain the target node data. In this way, the detection accuracy of the welding machine 1 can be guaranteed while also taking into account the detection speed.

[0080] Furthermore, by performing two averaging operations, the detection stability of the target node data can be improved, and the offset error and gain error of the first acquisition unit 21, the second acquisition unit 22 and the third acquisition unit 23 can be prevented from affecting the detection results of the target node data.

[0081] Step 4: Use the welding machine 1 data collected by the source node as the source node data, and use the welding machine 1 data output by the acquisition module 2 as the target node data.

[0082] Step 5: Determine the data transmission offset based on the source node data and the target node data.

[0083] Step 6: Determine the final collected data based on the target node data and the data transmission offset. By determining the final collected data based on the data transmission offset, interference caused by noise can be removed, ensuring the accuracy and stability of the data detection of welding machine 1.

[0084] in:

[0085] Final collected data = data transmission offset × target node data + target node data

[0086] Data transfer offset = source node data – target node data.

[0087] Step 7: The acquisition module 2 has a wireless transmission function, which can transmit the data of the welding machine 1 to an external terminal to facilitate real-time monitoring of the welding parameters of the welding machine 1 during operation. The transmission power of the acquisition module 2 is adjusted according to the adaptive adjustment algorithm of the transmission power, and the final acquired data is transmitted to the external terminal. The transmission power of the wireless communication module of the acquisition module 2 can be adjusted through the adaptive adjustment method of the transmission power, which can reduce power consumption while ensuring the data transmission quality of the welding machine 1, thereby achieving the purpose of low power consumption and energy saving.

[0088] In this invention, the external terminal can be an APP client for smartphones, a server, and backend management software, which can remotely monitor data and diagnose faults of welding machine 1, providing better service and user experience for users of welding machine 1.

[0089] Specifically, the adaptive transmission power adjustment method includes the following steps:

[0090] Step 71: After the target node sends a request data frame, the source node transmits an information frame to the target node;

[0091] Step 72: After receiving the corresponding data, the source node and the target node obtain the received signal strength of the link. Based on the obtained received signal strength of the link, the received signal strength RSS I1 of the source node and the received signal strength RSS I2 of the target node can be determined.

[0092] For example, after the source node receives a request data frame, it can obtain the received signal strength of the target node's transmitted signal; after the target node receives an information frame, it can obtain the received signal strength of the source node's transmitted signal.

[0093] According to the above definition, the communication quality of the current acquisition module can be quantitatively evaluated based on the received signal strength RSS I1 of the source node and the received signal strength RSS I2 of the target node.

[0094] Step 73: Determine the received signal offset RSS IΔ based on the received signal strength RSS I1 of the source node and the received signal strength RSS I2 of the target node.

[0095] Step 74: To improve the communication quality of acquisition module 2, adjust the transmission power of the acquisition module according to the adaptive transmission power adjustment algorithm.

[0096] Specifically, the adaptive transmission power adjustment algorithm is as follows:

[0097] P = RSS IΔ × [RSS I² – RSS I] ref ]+P ref , RSS IΔ=RSS I1–RSS I2,

[0098] in:

[0099] P is the transmission power of acquisition module 2;

[0100] RSS IΔ is the received signal offset;

[0101] RSS I1 represents the received signal strength at the source node;

[0102] RSS I2 represents the received signal strength at the target node;

[0103] RSS I ref This is a reference value for the received signal strength.

[0104] P ref This is a reference value for transmission power.

[0105] In this invention, the received signal strength reference value RSS I ref and the transmit power reference value P ref It can be determined based on the transmission characteristic curve of the communication chip in acquisition module 2.

[0106] In this invention, since welding is a continuous process, its process parameters are also a continuous process. To record the process parameters, it is necessary to record the current and voltage over a period of time. The acquisition module 2 continuously samples the data of the welding machine 1. Therefore, the acquisition module 2 can intelligently judge the voltage drop and the current rise to identify the start of welding, and judge the voltage rise and the current drop to identify the end of welding. In this way, the monitoring function of the acquisition module 2 is started and stopped.

[0107] 1. Welding machine 1 is determined to start welding when the voltage drops and to stop welding when the voltage rises.

[0108] 2. Welding machine 1 starts welding when the current rises and stops welding when the current falls.

[0109] In this invention, the two judgment methods described above can be used in combination.

[0110] like Figure 2 As shown, specifically, the fixing device 3 includes a fixing plate 11 fixed to the outside of the welding machine 1, and the fixing device 3 is fixed to the outside plate of the welding machine 1 through the fixing plate 11.

[0111] The fixed plate 11 is provided with sliding plates 12 on both sides; the sliding plates 12 are provided with clamping members 13 on both sides to clamp the acquisition module 2. The sliding plates 12 can slide relative to the fixed plate 11 through the sliding components 14 provided on both sides of the fixed plate 11. The sliding of the sliding plates 12 can drive the clamping members 13 to clamp the acquisition module 2.

[0112] The fixed plate 11 is equipped with a cylinder 15. The output end of the cylinder 15 is connected to one side of the slide plate 12 through a connecting plate 16. The cylinder 15 can synchronously drive the two slide plates 12 to slide relative to the fixed plate 11. The fixed plate 11 is equipped with a linkage component 17. The end of the linkage component 17 is connected to the side of the slide plate 12. When either side of the slide plate 12 moves, the linkage component 17 can drive the other side of the slide plate 12 to move synchronously.

[0113] like Figure 4 As shown, specifically, the clamping member 13 includes an L-shaped connector 132 fixedly connected to the slide plate 12 by connecting bolts 131. Rollers 134 are movably mounted on both sides of the L-shaped connector 132 via bearings 133. The bearings 133 allow the rollers 134 to roll relative to the L-shaped connector 132 and the acquisition module 2. The rollers 134 can simultaneously clamp the four corners of the clamping plate at the bottom of the acquisition module 2. Since the clamping of the clamping plate by the rollers 134 is a continuous clamping process, the clamping of the clamping plate by the rollers 134 goes from loose to tight. Because the rollers 134 can roll relative to the L-shaped connector 132 and the clamping plate, the entire clamping process is smooth. If the rollers 134 are made of a rigid material that does not rotate, the clamping force of the rigid material will damage the clamping plate and affect the installation quality of the acquisition module 2.

[0114] In this invention, the contact portion between the roller 134 and the clamping plate is provided with an anti-slip pad made of a flexible material, which can be made of rubber. In this way, when the roller 134 clamps the clamping plate, the two anti-slip pads can cover the outer surface of the clamping plate, so that the clamping force is uniform and the outer surface of the clamping plate will not be damaged even under a large clamping force.

[0115] Furthermore, in this invention, in order to increase the friction between the roller 134 and the clamping plate, several patterns can be set on the anti-slip pad to increase the clamping effect between the roller 134 and the clamping plate and improve the installation stability of the acquisition module 2.

[0116] Specifically, the linkage component 17 includes a rotating shaft 171 fixed to the fixed plate 11, a linkage member 172 is provided on the rotating shaft 171, and the linkage member 172 can rotate relative to the rotating shaft 171. The axis of the rotating shaft 171 is located at the middle position of the linkage member 172.

[0117] The linkage 172 is provided with linkage rods 173 on both sides, and the other end of the linkage rod 173 is fixedly connected to the side of the slide plate 12. In this way, when only one side of the slide plate 12 moves, the slide plate 12 on the moving side can drive the linkage rod 173 on the same side to move, and then the linkage 172 drives the linkage rod 173 on the other side to move the other end of the slide plate 12 synchronously, so as to achieve the effect of synchronous movement of both slide plates 12.

[0118] In this invention, sliding components 14 are disposed at the four corners of the fixed plate 11, wherein the two sliding components 14 on the left side of the fixed plate 11 are disposed corresponding to the left sliding plate 12, and the two sliding components 14 on the right side of the fixed plate 11 are disposed corresponding to the right sliding plate 12.

[0119] like Figure 3 As shown, specifically, the sliding assembly 14 includes a slide rail 141 fixed to the fixed plate 11 and a slider 142 fixed to the slide plate 12. The slider 142 is provided with a slide groove 143 that engages with the slide rail 141. By setting the slide groove 143, the slide rail 141 can limit the slider 142, preventing the slider 142 from disengaging from the slide rail 141 during rolling, so that the slider 142 can move along the pre-set slide rail 141.

[0120] The slider 142 can move along the preset slide rail 141. When in use, the sliders 142 corresponding to the upper and lower sides of the slide plate 12 can be engaged with the slide rails 141 corresponding to the upper and lower sides of the fixed plate 11. In this way, the slide rail 141 can guide the slider 142. When the slide plate 12 moves, it can guide it to ensure that the slide plate 12 will not deviate when moving, making the movement of the slide plate 12 more stable and achieving the effect of left and right sliding.

[0121] like Figure 6 As shown, specifically, the first acquisition unit 21 includes a first measurement component 211 connected to the input terminal of the acquisition module 2; the output terminal of the first measurement component 211 is fixedly connected to the input terminal of the first differential amplifier 212, and the output terminal of the first differential amplifier 212 is fixedly connected to the input terminal of the filter 213. The data signal at the output terminal of the first measurement component 211 is small and the received data signal has out-of-band noise, so the first differential amplifier 212 is needed to amplify it. The first differential amplifier 212 also performs filtering while amplifying, but the first differential amplifier 212 itself also has noise. Therefore, a filter 213 is set after the first differential amplifier 212 for further filtering to remove the noise of the first differential amplifier 212, thereby improving the accuracy of the first acquisition unit 21 in detecting the data of the welding machine 1.

[0122] Specifically, the second acquisition unit 22 includes a second measurement component 221 connected to the input terminal of the acquisition module 2, and the output terminal of the second measurement component 221 is fixedly connected to the input terminal of the second differential amplifier 222. The data signal at the output terminal of the second measurement component 221 is small and the received data signal has out-of-band noise, so the second differential amplifier 222 is needed to amplify it. The second differential amplifier 222 suppresses common-mode interference, amplifies, and filters at the same time, so that the second acquisition unit 22 can improve the data detection efficiency of the welding machine 1 and achieve better accuracy.

[0123] The third acquisition unit 23 includes a third measuring component connected to the input terminal of the acquisition module 2, and the output terminal of the third measuring component is fixedly connected to the input terminal of the third differential amplifier 232. The data signal at the output terminal of the third measuring component is small and the received data signal has out-of-band noise, so the third differential amplifier 232 is needed to amplify it. The third differential amplifier 232 suppresses common-mode interference, amplifies, and filters at the same time, so that the third acquisition unit 23 can improve the data detection efficiency of the welding machine 1 while also achieving good accuracy.

[0124] In this invention, since a first acquisition unit 21, a second acquisition unit 22 and a third acquisition unit 23 are set up, the internal data of the welding machine 1 is obtained through three acquisition units. Although the sampling of the filter 213 will improve the accuracy of the data detection of the welding machine 1, the sampling of the filter 213 will also reduce the speed of the data detection of the welding machine 1 accordingly.

[0125] Therefore, in this invention, a filter 213 is set in the first acquisition unit 21, but no filter 213 is set in the second acquisition unit 22 and the third acquisition unit 23, which can ensure the data detection accuracy of the welding machine 1 while taking into account the detection speed.

[0126] In this invention, the acquisition module 2 is mainly composed of three parts: a sheet metal shell, a data acquisition board, and a power supply. This makes the acquisition module 2 small in size, simple in structure, and suitable for easy installation on the housing of the welding machine 1, making it highly practical.

[0127] The data acquisition board is an integrated circuit board. The data acquisition board integrates CAN bus protocol, RJ45 network port and communication chip. The first acquisition unit 21, the second acquisition unit 22 and the third acquisition unit 23 are also integrated inside the data acquisition board. They are connected to the internal system of welding machine 1 through CAN protocol bus to acquire the communication data of welding machine 1, and then convert it into a general network protocol to transmit the data to the external PC.

[0128] The power supply mainly powers the acquisition module 2. The input voltage of the power supply is 220V and the output voltage is 24V. The power supply is powered by the welding machine 1 itself and converted to 24V power to power the data acquisition board.

[0129] The sheet metal casing is made of galvanized steel and is used for data acquisition boards and power supplies. The data acquisition boards and power supplies in the sheet metal casing can be fixedly connected to each other using plastic screws.

[0130] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A method for data acquisition and transmission in a welding machine, characterized in that, Includes the following steps: Step 1: Use the welding machine as the source node and the acquisition module as the target node. The source node and the target node detect the welding machine data information respectively. When the target node sends a request data frame, the source node transmits the welding machine data information frame to the target node. Step 2: Use the welding machine data collected by the source node as the source node data, and use the welding machine data output by the acquisition module as the target node data. Determine the data transmission offset based on the source node data and the target node data. Step 3: Determine the final collected data based on the target node data and the data transmission offset; Step 4: Adjust the transmission power of the acquisition module according to the adaptive transmission power adjustment algorithm, and transmit the final acquired data to the external terminal; Final collected data = data transmission offset × target node data + target node data; Data transfer offset = source node data – target node data; In step 4, the adaptive transmission power adjustment algorithm includes the following steps: 1) After the target node sends a request data frame, the source node transmits an information frame to the target node; 2) After receiving the corresponding data, the source node and the target node obtain the received signal strength of the link and determine the received signal strength RSSI1 of the source node and the received signal strength RSSI2 of the target node. 3) Determine the received signal offset RSSIΔ based on the received signal strength RSSI1 of the source node and RSSI2 of the target node; 4) Adjust the transmission power of the acquisition module according to the adaptive transmission power adjustment algorithm.

2. The welding machine data acquisition and transmission method according to claim 1, characterized in that: In step 2, the method for the acquisition module to output target node data includes the following steps: 1) Establish a minimum periodic information sampling interval, and the acquisition module continuously performs sampling; 2) The first acquisition unit and the second acquisition unit in the acquisition module perform initial sampling synchronously, and the first acquisition unit and the third acquisition unit in the acquisition module perform re-sampling synchronously, with the initial sampling and re-sampling performed at intervals. 3) Perform mean averaging on the initial sampled data to obtain the initial mean sampled data, and perform mean averaging on the resampled data to obtain the remean sampled data; 4) Perform mean-averaging on the initial and subsequent sampled data to obtain the target node data.

3. The welding machine data acquisition and transmission method according to claim 2, characterized in that: The adaptive transmission power adjustment algorithm uses the following calculation method: P=RSSIΔ×[RSSI2–RSSI ref ]+P ref 、RSSIΔ= RSSI1–RSSI2, in: P is the transmission power of the acquisition module (2); RSSIΔ is the received signal offset; RSSI1 is the received signal strength of the source node; RSSI2 is the received signal strength at the target node; RSSI ref This is a reference value for the received signal strength. P ref This is a reference value for transmission power.

4. A welding machine data acquisition and transmission system for performing the welding machine data acquisition and transmission method as described in any one of claims 1-3, characterized in that: The acquisition module is fixed to the outside of the welding machine by a fixing device. The fixing device includes a fixing plate fixed to the outside of the welding machine, and sliding plates are provided on both sides of the fixing plate. Clamping parts for holding the acquisition module are provided on both sides of the sliding plates. The sliding plates can slide relative to the fixing plate through sliding components provided on both sides of the fixing plate. A cylinder is provided on the fixing plate. The output end of the cylinder is connected to one side of the sliding plate through a connecting plate. The cylinder can synchronously drive both sliding plates to slide relative to the fixing plate. A linkage component is provided on the fixing plate. The end of the linkage component is connected to the side of the sliding plate. When one side of the sliding plate moves, the other side of the sliding plate can be driven to move synchronously through the linkage component.

5. The welding machine data acquisition and transmission system according to claim 4, characterized in that: The clamping component includes an L-shaped connector that is fixedly connected to the slide plate by connecting bolts, and rollers are movably provided on both sides of the L-shaped connector via bearings; the rollers can roll relative to the L-shaped connector and the acquisition module, and the rollers can clamp the acquisition module.

6. The welding machine data acquisition and transmission system according to claim 5, characterized in that: The linkage component includes a rotating shaft fixed to a fixed plate, a linkage member on the rotating shaft, and the linkage member can rotate relative to the rotating shaft; linkage rods are provided on both sides of the linkage member, and the other end of the linkage rod is fixedly connected to the side of the slide plate.

7. The welding machine data acquisition and transmission system according to claim 6, characterized in that: The sliding assembly includes a slide rail fixed to a fixed plate and a slider fixed to a sliding plate, and the slider is provided with a groove that engages with the slide rail.

8. The welding machine data acquisition and transmission system according to claim 7, characterized in that: The first acquisition unit includes a first measurement component connected to the input terminal of the acquisition module; the output terminal of the first measurement component is fixedly connected to the input terminal of a first differential amplifier, and the output terminal of the first differential amplifier is fixedly connected to the input terminal of a filter.

9. The welding machine data acquisition and transmission system according to claim 8, characterized in that: The second acquisition unit includes a second measurement component connected to the input terminal of the acquisition module, and the output terminal of the second measurement component is fixedly connected to the input terminal of the second differential amplifier; the third acquisition unit includes a third measurement component connected to the input terminal of the acquisition module, and the output terminal of the third measurement component is fixedly connected to the input terminal of the third differential amplifier.

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