An information acquisition device for a trolley on a production line and its working method

Abstract

The present invention provides a trolley information acquisition device on a production line and its working method, including a detection component. The detection component includes a frame, a trolley on-line sensor, an encoder, a detection sensor, a grating sensor, a controller, and an RFID device. The frame is set on the track, and the controller is set on one side of the track. The trolley is connected to the slide plate through a bracket, and a trigger bracket is provided at the bottom of the slide plate. By setting the trolley information acquisition device on the production line at the entrance of the production line, when the trolley enters the production line, its product information is identified, its walking distance is measured, and a data queue is generated. During the subsequent production process, its position on the production line can be accurately calculated, so as to determine which station it has reached and which processing should be carried out, solving the problems existing in the existing production line that a large number of RFID reading and writing devices and sensors need to be installed, resulting in a complex system, a large data flow, high costs, and high failure rates.

Description

Technical Field

[0001] The present invention relates to the technical fields of informatization and automatic control, and particularly relates to a trolley information acquisition device on a production line and its working method. Background Art

[0002] With the improvement of the living standards of the people in our country, the demand for high-quality products is increasing day by day. At the same time, the manufacturing industry in our country is also accelerating transformation and upgrading to improve product quality and competitiveness. Therefore, it is essential to carry out production process control, data traceability, process data management, quality analysis, etc. during the product production process.

[0003] At the present stage, the traceability of trolley or other product data on the production line and the positioning and processing of products on the production line are extremely common in the field of large-scale production. At present, two methods of two-dimensional code recognition and RFID recognition are mostly used. The two-dimensional code recognition has limited use due to its non-recyclable nature and harsh scanning conditions. RFID recognition is widely used due to its advantages such as long induction distance, strong anti-interference ability, and convenient and fast data acquisition.

[0004] Currently, on the production line, a set of RFID reading and writing devices and sensors are generally installed at each work station to position the trolley and obtain production data. This method requires the installation of more RFID reading and writing devices and sensors, resulting in a complex system, large data flow, high cost, and high failure rate. Summary of the Invention

[0005] The embodiment of the present invention provides a trolley information acquisition device on a production line and its working method. By setting the trolley information acquisition device on the production line at the entrance of the production line, when the trolley enters the production line, its product information is recognized, its traveling distance is measured, and a data queue is generated. During the subsequent production process, its position on the production line can be accurately calculated, so as to determine which work station it has reached and which processing should be carried out, solving the problem that the existing production line needs to install more RFID reading and writing devices and sensors, resulting in a complex system, large data flow, high cost, and high failure rate.

[0006] In view of the above problems, the technical solution proposed by the present invention is:

[0007] A trolley information acquisition device on a production line is arranged on the track of the production line and includes:

[0008] A detection component, the detection component includes a frame, a trolley on-line sensor, an encoder, a detection sensor, a grating sensor, a controller, and an RFID device.

[0009] Among them, the frame is arranged on the track, the trolley on-line sensor, the encoder, the detection sensor, the RFID device and the grating sensor are sequentially arranged on the track, and the trolley on-line sensor, the encoder, the detection sensor and the RFID device are sequentially arranged inside the frame in the direction from the entrance to the exit of the frame, the grating sensor is located at the exit of the frame, and the controller is arranged on one side of the track;

[0010] A trolley is arranged on the track on the entrance side of the frame. The trolley includes a bracket and a slide plate. The trolley is connected to the slide plate through the bracket, and a trigger bracket is arranged at the bottom of the slide plate.

[0011] In order to better implement the technical solution of the present invention, the following technical measures are also adopted.

[0012] Further, the signal input ends of the controller are respectively communicatively connected to the signal output ends of the trolley on-line sensor, the encoder, the detection sensor, the RFID device and the grating sensor, and the signal output ends of the controller are respectively communicatively connected to the signal input ends of the encoder and the RFID device.

[0013] Further, the side of the trigger bracket close to the entrance is flush with the side of the slide plate close to the entrance.

[0014] Further, the trigger bracket is used to trigger the trolley on-line sensor.

[0015] Further, the number of the encoders is two, which are distributed on both sides of the track. The encoder contacts the edge of the slide plate and is used to measure the moving distance of the trolley.

[0016] Further, the number of the trolleys is at least greater than one, and the slide plates of adjacent trolleys are closely attached to each other.

[0017] A working method of a trolley information acquisition device on a production line includes the following steps:

[0018] Step 1, the trolley moves forward with the slide plate and enters the interior of the frame;

[0019] Step 2, after entering the interior of the frame, first the trigger bracket arranged at the bottom of the slide plate contacts the trolley on-line sensor, triggers the on-line sensor, clears the encoder data, and then the encoder starts to count to calculate the moving distance of the current slide plate entering the interior of the frame;

[0020] Step 3, the trolley continues to move forward. When the moving distance of the trolley reaches the preset value of the encoder count, the detection sensor detects and judges whether it is an empty trolley;

[0021] Step 4: If the trolley is not empty, trigger the RFID device to start reading the RFID information on the trolley body. After the reading is completed, send the label data of the trolley to the controller. If no label data is read, send a reading failure message to the controller.

[0022] Step 5: If the trolley is empty, do not trigger the RFID device to read data, directly let the trolley pass, and at the same time send an empty trolley message to the controller.

[0023] Step 6: After the controller receives the information sent by the RFID device, combine it with the current value of the encoder to generate a queue and generate data queue information.

[0024] Step 7: The controller obtains the specific position of the trolley on the production line and the corresponding workstations according to the generated data queue information.

[0025] Step 8: According to the specific position of the trolley on the production line, obtain the actual distance between the current trolley and the corresponding workstation.

[0026] Furthermore, the starting point for the encoder to calculate the moving distance of the current skateboard entering the frame is the installation position of the trolley on-line sensor.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting the trolley information acquisition device on the production line at the entrance of the production line, identifying the product information of the trolley when it enters the production line, measuring its walking distance, generating a data queue, and accurately calculating its position on the production line during the subsequent production process, so as to judge which workstation it has reached and which processing should be carried out, solving the problems of complex system, large data flow, high cost and high failure rate caused by the need to install more RFID reading and writing devices and sensors.

[0028] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically gives the specific embodiments of the present invention. Brief Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the trolley information acquisition device on the production line disclosed in the embodiment of the present invention;

[0030] Figure 2 It is Figure 1 The enlarged structural diagram at position A in

[0031] Figure 3 It is Figure 1 The enlarged structural diagram at position B in

[0032] Figure 4Communication block diagram of the trolley information acquisition device on the production line disclosed in the embodiments of the present invention;

[0033] Figure 5 Structural schematic diagram of the detection device installed on the production line in the prior art;

[0034] Figure 6 Structural schematic diagram of the detection component installed on the production line disclosed in the embodiments of the present invention;

[0035] Figure 7 Schematic flow chart of the working method of a trolley information acquisition device on the production line disclosed in the embodiments of the present invention;

[0036] Figure 8 Schematic diagram of the data queue information structure in step 6 disclosed in the embodiments of the present invention.

[0037] Reference numerals: 1, detection component; 11, frame; 111, entrance; 112, exit; 12, trolley on-line sensor; 13, encoder; 14, detection sensor; 15, grating sensor; 16, controller; 17, RFID device; 2, trolley; 21, bracket; 22, sliding plate; 221, trigger bracket; 3, track. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0039] Refer to the attached Figure 5 As shown, in the traditional solution of the production line, as many RFID reading and writing devices and sensors as there are data acquisition stations are installed to obtain the position of the trolley and the production data of the trolley.

[0040] Refer to the attached Figures 1-6As shown in the figure, a trolley information acquisition device on a production line is arranged on the track 3 of the production line. It includes a detection component 1, and the detection component 1 includes a frame 11, a trolley on-line sensor 12, an encoder 13, a detection sensor 14, a grating sensor 15, a controller 16 and an RFID device 17. The frame 11 is arranged on the track 3. The trolley on-line sensor 12, the encoder 13, the detection sensor 14, the RFID device 17 and the grating sensor 15 are sequentially arranged on the track 3. And the trolley on-line sensor 12, the encoder 13, the detection sensor 14 and the RFID device 17 are sequentially arranged inside the frame 11 in the direction from the entrance 111 to the exit 112 of the frame 11. The grating sensor 15 is located at the exit 112 of the frame 11. The controller 16 is arranged on one side of the track 3. There is a trolley 2 arranged on one side of the entrance 111 of the frame 11 on the track 3. The trolley 2 includes a bracket 21 and a slide plate 22. The trolley 2 is connected by the bracket 21 and the slide plate 22. A trigger bracket 221 is arranged at the bottom of the slide plate 22. By setting the trolley 2 information acquisition device on this production line at the entrance 111 of the production line, when the trolley 2 enters the production line, its product information is identified, its traveling distance is measured, and a data queue is generated. During the subsequent production process, its position on the production line can be accurately calculated, so as to judge which station it has reached and which processing should be carried out, solving the problems existing in the existing production line that a large number of RFID reading and writing devices and sensors need to be installed, resulting in a complex system, a large data flow, high costs and high failure rates.

[0041] In this embodiment, the model of the trolley on-line sensor 12 is respectively defined as Turck NI50U-QV40-AP6X2-H1141; the model of the encoder 13 is SICK DBS36E-S3GKO2000; the RFID device 17 is: Pepperl+Fuchs IUH-F192-V1-FR2, IC-KP2-1HB17-2V1D; the model of the detection sensor 14 is: Omron proximity switch, E2B-M30LN30-WZ-C1, Omron photoelectric sensor E3JM-10M4-G-NN. Among them, the number of Omron proximity switches is four, and the number of Omron photoelectric sensors is five, which are arranged on the track 3 through sensor brackets; the model of the grating sensor 15 is: Omron F3SG-SR;

[0042] It should be noted that the signal input terminals of the controller 16 are respectively communicatively connected to the signal output terminals of the trolley on-line sensor 12, the encoder 13, the detection sensor 14, the RFID device 17, and the grating sensor 15, and the signal output terminals of the control are respectively communicatively connected to the signal input terminals of the encoder 13 and the RFID device 17. When the trolley 2 enters the interior of the frame 11, when the encoder 13 reaches a preset value, when the detection sensor 14 detects the slide plate 22 and the trolley 2, and when the RFID device 17 fails: the RFID device 17 starts to read tag data. After judging that the trolley 2 has left the reading and writing area through the encoder 13 and the detection sensor 14, if the RFID device 17 still fails to read the tag data, the controller 16 sends a reading failure signal.

[0043] The embodiments of the present invention are also implemented through the following technical solutions.

[0044] Refer to the attached Figure 1 and 2 As shown, in the embodiment of the present invention, the side of the trigger bracket 221 close to the entrance 111 is flush with the side of the slide plate 22 close to the entrance 111, and the trigger bracket 221 is used to trigger the trolley on-line sensor 12.

[0045] It should be noted that after the trigger bracket 221 provided at the bottom of the slide plate 22 contacts the trolley on-line sensor 12, the trolley on-line sensor 12 is triggered. While judging that the trolley 2 is on-line, the controller 16 clears the data of the encoder 13, starts counting and measuring again, and reduces the cumulative error caused by other reasons in the coding.

[0046] Refer to the attached Figure 1 and 3 As shown, in the embodiment of the present invention, the number of the encoders 13 is two, which are distributed on both sides of the track 3. The encoder 13 contacts the edge of the slide plate 22 and is used to measure the moving distance of the trolley 2.

[0047] It should be noted that by measuring the distance between the current trolley 2 slide plate 22 and the on-line point by the encoder 13, the controller 16 can analyze the position of the trolley 2 slide plate 22 on the production line. When the trolley on-line sensor 12 is triggered, the slide plate 22 starts to contact the counting wheel of the encoder 13, and the counting wheel is driven to rotate by the frictional force, thereby driving the encoder 13 to rotate and count. In order to prevent abnormalities in devices such as the encoder 13, two encoders 13 are provided. When the values of the two encoders 13 differ by more than the preset value, an alarm is given to indicate a fault. At the same time, the faulty encoder 13 is judged according to the change of the encoder 13 data and removed, and the other encoder 13 is enabled to ensure the normal operation of the production line and improve the stability of the system.

[0048] Refer to the attached Figure 5 、 6As shown in FIGS. 7 and 8, in the embodiment of the present invention, the number of trolleys 2 is at least greater than one, and the slides 22 of adjacent trolleys 2 are closely attached to each other.

[0049] It should be noted that since the slide 22 of the trolley 2 on the production line and the length of the production line are fixed values, and the trolley 2 production line is in a pushing mode, the gap between the slides 22 is extremely small and can be ignored. According to the value of the encoder 13 and the queue information, the distance of each trolley 2 from the online point can be accurately calculated, that is, the real-time positioning of the trolley 2 on the line body is realized.

[0050] The calculation formula for the position of the slide 22 is: Sn = L * n + D (L: the length of the slide 22, n: the number of the slide 22 in the queue, D: the current value of the encoder 13, and all the above units are in meters)

[0051] Based on this positioning, it can be judged which station a certain trolley 2 has reached or is about to reach, as well as information such as the processing data and processing time of the station.

[0052] Refer to the appendix Figures 1-8 As shown, the present invention also proposes a working method for a trolley information acquisition device on a production line, including the following steps:

[0053] Step 1, the trolley 2 moves forward with the slide 22 and enters the interior of the frame 11;

[0054] Step 2, after entering the interior of the frame 11, first, the trigger bracket 221 provided at the bottom of the slide 22 contacts the trolley on-line sensor 12, triggering the on-line sensor, and the data of the encoder 13 is cleared. Then, the encoder 13 starts to count, calculates the moving distance of the current slide 22 entering the interior of the frame 11, and the starting point for the encoder 13 to calculate the moving distance of the current slide 22 entering the interior of the frame 11 is the installation position of the trolley on-line sensor 12;

[0055] Step 3, the trolley 2 continues to move forward. When the moving distance of the trolley 2 reaches the preset value of the encoder 13 count, the detection sensor 14 detects and judges whether the trolley 2 is an empty trolley;

[0056] Step 4, if it is not an empty trolley 2, then trigger the RFID device 17 to start reading the RFID information on the body of the trolley 2. After the reading is completed, send the tag data of the trolley 2 to the controller 16. If no tag data is read, send a reading failure message to the controller 16;

[0057] Step 5, if it is an empty trolley 2, do not trigger the RFID device 17 to read data, directly release the trolley 2 to pass, and at the same time send the empty trolley 2 information to the controller 16;

[0058] Step 6, after the controller 16 receives the information sent by the RFID device 17, it combines the current value of the encoder 13 to generate a queue and generates data queue information.

[0059] Refer to the appendix Figure 8 As shown, it should be noted that the structure of the generated queue information includes the position of the trolley 2 and the information of the trolley 2. In the figure, N12345 to N12352, etc. are the data read by the RFID device 17, and the read data also includes production data.

[0060] Step 7, the controller 16 obtains the specific position of the trolley 2 on the production line and the corresponding workstations according to the generated data queue information.

[0061] Step 8, according to the specific position of the trolley 2 on the production line, the actual distance between the current trolley 2 and the corresponding workstation is obtained.

[0062] Specifically, after the trolley 2 enters the detection component 1, the slide plate 22 of the trolley 2 is detected by the trolley on-line sensor 12. The controller 16 clears the data of the encoder 13 according to the signal output by the trolley on-line sensor 12. The counting wheel of the encoder 13 contacts the slide plate 22 of the trolley 2 to detect the moving distance of the trolley 2. When the moving distance of the trolley 2 reaches the preset value of the encoder 13 count, the detection sensor 14 is triggered to detect and judge whether the trolley 2 is an empty trolley. If it is an empty trolley 2, the RFID device 17 is not triggered to read data, and the trolley 2 is directly released, and at the same time, the empty trolley 2 information is sent to the controller 16. If it is a non-empty trolley 2, the RFID device 17 is triggered to start reading the RFID information on the body of the trolley 2. After the reading is completed, the label data of the trolley 2 is sent to the controller 16. If the label data is not read, the reading failure information is sent to the controller 16. After the controller 16 receives the information sent by the RFID device 17, it combines the current value of the encoder 13 to generate a queue and generates data queue information. By analyzing the data queue information, the specific position of the trolley 2 on the production line, the corresponding workstation and the actual distance between the current trolley 2 and the corresponding workstation can be obtained, and its position on the production line can be accurately calculated in the subsequent production process, so as to judge which workstation has been reached and which processing should be carried out. Compared with the prior art, it is not necessary to install multiple RFID devices 17 and sensors for different workstations, the overall structure is simple, and the problems of the existing production line, such as the need to install more RFID reading and writing devices and sensors, resulting in a complex system, large data flow, high cost and high failure rate, are solved.

[0063] It should be noted that the specific model specifications of the trolley on-line sensor 12, the encoder 13, the detection sensor 14, the grating sensor 15, the controller 16 and the RFID device 17 need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in the field, so it will not be elaborated in detail.

[0064] The power supply and its principle of the trolley on-line sensor 12, encoder 13, detection sensor 14, grating sensor 15, controller 16 and RFID device 17 are clear to those skilled in the art and will not be described in detail herein.

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

Claims

1. A trolley information acquisition device on a production line, which is arranged on the track of the production line, is characterized in that, Including: A detection component, which includes a frame, a trolley on-line sensor, an encoder, a detection sensor, a grating sensor, a controller, and an RFID device. Among them, the frame is set on the track, the trolley on-line sensor, the encoder, the detection sensor, the RFID device, and the grating sensor are sequentially set on the track, and the trolley on-line sensor, the encoder, the detection sensor, and the RFID device are sequentially set inside the frame in the direction from the entrance to the exit of the frame. The grating sensor is located at the exit of the frame, and the controller is set on one side of the track. A trolley is set on the track on the side of the entrance of the frame. The trolley includes a bracket and a slide plate. The trolley is connected to the slide plate through the bracket. A trigger bracket is set at the bottom of the slide plate, and the trigger bracket is used to trigger the trolley on-line sensor. The number of the encoders is two, which are distributed on both sides of the track. The encoder is in contact with the edge of the slide plate and is used to measure the moving distance of the trolley. The number of the trolleys is at least greater than one, and the slide plates of adjacent trolleys are closely attached to each other. A working method of a trolley information acquisition device on a production line includes the following steps: Step 1, the trolley moves forward with the slide plate and enters the inside of the frame. Step 2, after entering the inside of the frame, first the trigger bracket set at the bottom of the slide plate contacts the trolley on-line sensor, triggering the on-line sensor, clearing the encoder data, and then the encoder starts to count to calculate the moving distance of the current slide plate entering the inside of the frame. Step 3, the trolley continues to move forward. When the moving distance of the trolley reaches the preset value of the encoder count, the detection sensor detects and judges whether it is an empty trolley. Step 4, if it is not an empty trolley, then trigger the RFID device to start reading the RFID information on the trolley body. After the reading is completed, send the tag data of the trolley to the controller. If the tag data is not read, send a reading failure message to the controller. Step 5, if it is an empty trolley, do not trigger the RFID device to read data, directly release the trolley to pass through, and at the same time send empty trolley information to the controller. Step 6, after the controller receives the information sent by the RFID device, combine it with the current value of the encoder to generate a queue and generate data queue information. Step 7, the controller obtains the specific position and corresponding work station of the trolley on the production line according to the generated data queue information. Step 8, according to the specific position of the trolley on the production line, obtain the actual distance between the current trolley and the corresponding work station.

2. The information acquisition device for the trolley on the production line according to claim 1, characterized in that: The signal input end of the controller is respectively communicatively connected with the signal output ends of the trolley on-line sensor, the encoder, the detection sensor, the RFID device, and the grating sensor. The signal output end of the controller is respectively communicatively connected with the signal input ends of the encoder and the RFID device.

3. The trolley information acquisition device on a production line according to claim 1, characterized in that: One side of the trigger bracket close to the entrance is flush with one side of the slide plate close to the entrance.

4. The working method of a trolley information acquisition device on a production line according to claim 1, characterized in that: The starting point for the encoder to start calculating the moving distance of the current slide plate entering the inside of the frame is the installation position of the trolley on-line sensor.

Images