Automatic control method for recycling LCD screen logos of mobile terminals

Abstract

The present invention discloses an automatic control method for recycling mobile terminal liquid crystal screen logos, including a host computer, a PLC controller 1, a PLC controller 2, an industrial camera g1, an industrial camera g2, a solenoid valve D1, a solenoid valve D2, a relay, a servo motor S1, a servo motor S2, a servo motor S3, a pneumatic device Q1, a pneumatic device Q2, a conveyor belt-AC motor, a three-coordinate slide, a stepper motor B1, a stepper motor B2, a stepper motor B3, a straight-moving push rod device, a coding device, a pressure sensor Y1, a pressure sensor Y2, a photoelectric sensor G1 and a photoelectric sensor G2. The automatic control system and method for recycling the logos of waste mobile terminal liquid crystal screens realizes a series of automatic control operations of transmission, photographing, signal transmission and coding of mobile terminal liquid crystal screens through the reasonable arrangement of the host computer, the PLC controller, the industrial camera, the solenoid valve, the relay, the conveyor belt-AC motor, the servo motor and the pneumatic device.

Description

Technical Field

[0001] The invention relates to the field of liquid crystal screen technology and classified recycling, and in particular to an automatic control method for recycling liquid crystal screen logos of mobile terminals. Background Art

[0002] Liquid crystal screens use liquid crystal materials as basic components. Liquid crystal materials are filled between two parallel plates. Voltage is used to change the arrangement of molecules inside the liquid crystal material to achieve the purpose of shading and light transmission to display images of varying depths and in a patchwork manner. Moreover, as long as a three-primary color filter layer is added between the two plates, color images can be displayed. Liquid crystal screens have very low power consumption, so they are favored by engineers and are suitable for all kinds of electronic devices. From the perspective of fluid mechanics, the viscosity and elasticity of liquid crystal can be said to be a liquid with arrangement properties. Different effects should be achieved according to the direction of the force. The liquid crystal display used in general electronic products uses the photoelectric effect of liquid crystal, through external voltage control, and then through the refractive characteristics of liquid crystal molecules and the ability to rotate light to obtain light and dark conditions (or known as visual optical contrast), thereby achieving the purpose of imaging. It itself has a strong recycling value.

[0003] LCD screens become obsolete after long-term use. The widespread popularity of small mobile terminals such as mobile phones and tablets will increase the rate of obsolescence of LCD screens. Currently, the processing of obsolete LCD screens is done manually, and the efficiency of recycling devices for LCD screens is mostly low. There is a lack of effective classification and automatic identification for the recycling of obsolete mobile terminal LCD screens. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic control method for labeling and recycling mobile terminal LCD screens, so as to solve the problem that LCD screens become obsolete after long-term use as mentioned in the above background technology. Currently, obsolete LCD screens are processed manually in life, and most of the devices for recycling LCD screens are inefficient, which leads to the problem that it is difficult to effectively classify, automatically label, recycle and reuse obsolete mobile terminal LCD screens.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an automatic control method for recycling mobile terminal LCD screen logos, including a host computer, a PLC controller 1, a PLC controller 2, an industrial camera g1, an industrial camera g2, a solenoid valve D1, a solenoid valve D2, a relay, a servo motor S1, a servo motor S2, a servo motor S3, a pneumatic device Q1, a pneumatic device Q2, a conveyor belt-AC motor, a three-coordinate slide, a stepper motor B1, a stepper motor B2, a stepper motor B3, a straight-moving push rod device, a coding device, a pressure sensor Y1, a pressure sensor Y2, a photoelectric sensor G1 and a photoelectric sensor G2.

[0006] Preferably, the PLC controller 1, solenoid valve D1, relay, servo motor S1, servo motor S2, servo motor S3, stepper motor B3, pneumatic device Q1, conveyor belt-AC motor, three-coordinate slide, inkjet device, photoelectric sensor G1, photoelectric sensor G2, and industrial camera g1 constitute a first control execution module, and multiple output ends of the PLC controller 1 are respectively connected to the input ends of the PLC controller 2, solenoid valve D1, relay, servo motor S1, servo motor S2, servo motor S3 and stepper motor B3, the output ends of the host computer and the stepper motor B3 are both connected to the input end of the inkjet device, the host computer and the PLC controller 1 are bidirectionally connected, the output ends of the photoelectric sensor G1 and the photoelectric sensor G2 are both connected to the input end of the PLC controller 1, the output end of the solenoid valve D1 is connected to the input end of the pneumatic device Q1, the output end of the relay is connected to the input end of the conveyor belt-AC motor, the output ends of the servo motor S1, servo motor S2, and servo motor S3 They are all connected to the input end of the three-coordinate slide. The first control execution module detects the position of the mobile terminal LCD screen to be marked on the conveyor belt through the photoelectric sensor G1 and the photoelectric sensor G2, and uses the PLC controller 1 to read the transmission position information to the host computer and make the following control: use the execution program of the host computer to control the on and off of the industrial camera g1 to identify the type of the mobile terminal LCD screen to be marked; use the relay to control the start and stop movement of the conveyor belt-AC motor to realize the start and stop movement of the conveyor belt; use the solenoid valve D1 to control the on and off of the pneumatic device Q1 to realize the adsorption and placement of the mobile terminal LCD screen to be marked; use the servo motor S1, servo motor S2, and servo motor S3 to control the three-coordinate slide to adsorb the mobile terminal LCD screens to be marked of different sizes and transmit them to different workstations; use the stepper motor B3 to control the position of the inkjet device to realize the automatic conversion of the inkjet position according to the type of the mobile terminal LCD screen to be marked, and at the same time use the host computer to transmit the specific type of the mobile terminal LCD screen to be marked that has been image-recognized to the inkjet device for marking and inkjet coding.

[0007] Preferably, the PLC controller 2, solenoid valve D2, stepper motor B1, stepper motor B2, pneumatic device Q2, straight-moving push rod device, pressure sensor Y1, pressure sensor Y2, and industrial camera g2 constitute a second control execution module, and multiple output ends of the PLC controller 2 are respectively connected to the input ends of the solenoid valve D2, stepper motor B1, and stepper motor B2, the output end of the solenoid valve D2 is connected to the input end of the pneumatic device Q2, the output ends of the stepper motor B1 and the stepper motor B2 are both connected to the input end of the straight-moving push rod device, the output ends of the pressure sensor Y1 and the pressure sensor Y2 are both connected to the input end of the PLC controller 2, and the industrial camera g1, the industrial camera g2 are bidirectionally connected to the host computer, The second control execution module determines the type of mobile terminal LCD screen to be marked and recycled transmitted by the first control execution module through the host computer, transmits the signal to PLC controller 2 through PLC controller 1, and uses PLC controller 2 to read the signal and make the following control: use the execution program of the host computer to control the on and off of industrial camera g2 to further identify the type of mobile terminal LCD screen to be marked and recycled; use the solenoid valve D2 to control the on and off of the pneumatic device Q2 to achieve the limit of the mobile terminal LCD screen to be marked and recycled; use stepper motor B1 and stepper motor B2 to control the straight-moving push rod device to achieve the positioning and transfer of the mobile terminal LCD screen to be marked and recycled, and pressure sensors Y1 and pressure sensors Y2 feedback pressure signals to ensure that the mobile terminal LCD screen to be marked and recycled will not be squeezed and damaged.

[0008] The automatic control method for recycling the LCD screen logo of a mobile terminal comprises the following steps:

[0009] STEP1: The host computer starts, reads the address of PLC controller 1 and initializes it;

[0010] STEP2: The conveyor belt-AC motor is started, and the LCD screen of the mobile terminal to be marked for recycling is placed on the conveyor belt for transmission;

[0011] STEP3: The LCD screen of the mobile terminal to be marked on the conveyor belt passes under the photoelectric sensor G1, triggering the photoelectric sensor G1 and transmitting the signal to the PLC controller 1. The PLC controller 1 reads the signal and delays the stop control of the conveyor belt-AC motor. At the same time, the host computer executes the program to read the signal of the PLC controller 1, turns on the control industrial camera g1 and obtains its image information, and then turns it off after obtaining it. The host computer performs image recognition on the image information to obtain the size information and clarify the position where the code can be sprayed. The delay program in the PLC controller 1 triggers the conveyor belt-AC motor to start again.

[0012] STEP 4: The LCD screen of the mobile terminal to be marked and recycled on the conveyor belt passes under the photoelectric sensor G2, triggering the photoelectric sensor G2 and transmitting the signal to the PLC controller 1. The PLC controller 1 reads the signal and performs a delayed stop control on the conveyor belt-AC motor; the PLC controller 1 controls the solenoid valve D1 to open the pneumatic device Q1, and at the same time controls the servo motor S1, servo motor S2, and servo motor S3 to adsorb the LCD screen of the mobile terminal to be marked and recycled and move it to the next station. The PLC controller 1 transmits the signal to the PLC controller 2;

[0013] STEP5: After the next station receives the mobile terminal LCD screen to be marked, the PLC controller 2 controls the stepper motor B1 and the stepper motor B2 to make the straight push rod device (two T-shaped push rods) push and position in a straight line; the pressure sensor Y1 and the pressure sensor Y2 are located at the end of the push rod. When the pressure reaches the threshold, the PLC controller 2 is triggered to execute the program, and the stepper motor B1 and the stepper motor B2 are self-locked to complete the positioning;

[0014] STEP6: The upper computer's execution program controls the industrial camera g2 to turn on, further identifies the type of mobile terminal LCD screen to be marked and recycled, and transmits the information to the inkjet printer. The PLC controller 1 controls the stepper motor B3 to enable the inkjet printer to perform mobile inkjet printing based on the information identified twice. After the inkjet printing is completed, the PLC controller 2 controls the solenoid valve D2 to disconnect the pneumatic device Q2, and at the same time delays the triggering of the execution program to control the stepper motor B1 to push the straight-moving push rod to push the mobile terminal LCD screen that has been automatically marked and coded into the storage device.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the automatic control method for recycling the logo of the mobile terminal LCD screen realizes a series of automatic control operations of transmission, photographing, signal transmission, and coding of the mobile terminal LCD screen through the reasonable arrangement of the host computer, PLC controller, industrial camera, solenoid valve, relay, conveyor belt-AC motor, servo motor, pneumatic device, three-coordinate slide, stepper motor, linear push rod device, coding device, pressure sensor, and photoelectric sensor, and can quickly and efficiently recycle the mobile terminal LCD screen to be recycled, and the whole process requires only a few manual operations, which conforms to the modern process flow and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a connection diagram of the system modules of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 , the present invention provides a technical solution:

[0019] The automatic control method for recycling liquid crystal screen logos of mobile terminals includes a host computer, a PLC controller 1, a PLC controller 2, an industrial camera g1, an industrial camera g2, a solenoid valve D1, a solenoid valve D2, a relay, a servo motor S1, a servo motor S2, a servo motor S3, a pneumatic device Q1, a pneumatic device Q2, a conveyor belt-AC motor, a three-coordinate slide, a stepper motor B1, a stepper motor B2, a stepper motor B3, a straight-moving push rod device, a coding device, a pressure sensor Y1, a pressure sensor Y2, a photoelectric sensor G1 and a photoelectric sensor G2.

[0020] PLC controller 1, solenoid valve D1, relay, servo motor S1, servo motor S2, servo motor S3, stepper motor B3, pneumatic device Q1, conveyor belt-AC motor, three-coordinate slide, inkjet device, photoelectric sensor G1, photoelectric sensor G2, industrial camera g1, constitute a first control execution module, multiple output ends of PLC controller 1 are respectively connected to the input ends of PLC controller 2, solenoid valve D1, relay, servo motor S1, servo motor S2, servo motor S3 and stepper motor B3, the output ends of the host computer and stepper motor B3 are both connected to the input end of the inkjet device, the host computer and PLC controller 1 are bidirectionally connected, the output ends of the photoelectric sensor G1 and the photoelectric sensor G2 are both connected to the input end of the PLC controller 1, the output end of the solenoid valve D1 is connected to the input end of the pneumatic device Q1, the output end of the relay is connected to the input end of the conveyor belt-AC motor, the output ends of the servo motor S1, servo motor S2, and servo motor S3 are all connected to the three-coordinate slide. The input end of the marking slide is connected, and the first control execution module detects the position of the mobile terminal LCD screen to be marked on the conveyor belt through the photoelectric sensor G1 and the photoelectric sensor G2, and uses the PLC controller 1 to read the transmission position information to the host computer and make the following control: use the execution program of the host computer to control the on and off of the industrial camera g1 to identify the type of the mobile terminal LCD screen to be marked; use the relay to control the start and stop movement of the conveyor belt-AC motor to realize the start and stop movement of the conveyor belt; use the solenoid valve D1 to control the on and off of the pneumatic device Q1 to realize the adsorption and placement of the mobile terminal LCD screen to be marked; use the servo motor S1, servo motor S2, and servo motor S3 to control the three-coordinate slide to adsorb the mobile terminal LCD screens to be marked of different sizes and transmit them to different stations; use the stepper motor B3 to control the position of the inkjet device to realize the automatic conversion of the inkjet position according to the type of the mobile terminal LCD screen to be marked, and at the same time use the host computer to transmit the specific type of the mobile terminal LCD screen to be marked that has been image-recognized to the inkjet device for marking and inkjet coding.

[0021] PLC controller 2, solenoid valve D2, stepper motor B1, stepper motor B2, pneumatic device Q2, straight-moving push rod device, pressure sensor Y1, pressure sensor Y2, industrial camera g2, constitute a second control execution module, the multiple output ends of the PLC controller 2 are respectively connected to the input ends of the solenoid valve D2, stepper motor B1 and stepper motor B2, the output end of the solenoid valve D2 is connected to the input end of the pneumatic device Q2, the output ends of the stepper motor B1 and stepper motor B2 are both connected to the input end of the straight-moving push rod device, the output ends of the pressure sensor Y1 and pressure sensor Y2 are both connected to the input end of the PLC controller 2, the industrial camera g1, industrial camera g2 are bidirectionally connected to the host computer, and the second control execution module. The control execution module determines the type of mobile terminal LCD screen to be marked and recycled transmitted by the first control execution module through the host computer, transmits the signal to PLC controller 2 through PLC controller 1, and uses PLC controller 2 to read the signal and make the following control: use the execution program of the host computer to control the on and off of industrial camera g2 to further identify the type of mobile terminal LCD screen to be marked and recycled; use the solenoid valve D2 to control the on and off of the pneumatic device Q2 to achieve the limit of the mobile terminal LCD screen to be marked and recycled; use stepper motor B1 and stepper motor B2 to control the straight-moving push rod device to achieve the positioning and transfer of the mobile terminal LCD screen to be marked and recycled, and the pressure sensor Y1 and pressure sensor Y2 feedback pressure signals to ensure that the mobile terminal LCD screen to be marked and recycled will not be squeezed and damaged.

[0022] The automatic control method for recycling the LCD screen logo of a mobile terminal comprises the following steps:

[0023] STEP1: The host computer starts, reads the address of PLC controller 1 and initializes it;

[0024] STEP2: The conveyor belt-AC motor is started, and the LCD screen of the mobile terminal to be marked for recycling is placed on the conveyor belt for transmission;

[0025] STEP3: The LCD screen of the mobile terminal to be marked on the conveyor belt passes under the photoelectric sensor G1, triggering the photoelectric sensor G1 and transmitting the signal to the PLC controller 1. The PLC controller 1 reads the signal and delays the stop control of the conveyor belt-AC motor. At the same time, the host computer executes the program to read the signal of the PLC controller 1, turns on the control industrial camera g1 and obtains its image information, and then turns it off after obtaining it. The host computer performs image recognition on the image information to obtain the size information and clarify the position where the code can be sprayed. The delay program in the PLC controller 1 triggers the conveyor belt-AC motor to start again.

[0026] STEP 4: The LCD screen of the mobile terminal to be marked and recycled on the conveyor belt passes under the photoelectric sensor G2, triggering the photoelectric sensor G2 and transmitting the signal to the PLC controller 1. The PLC controller 1 reads the signal and performs a delayed stop control on the conveyor belt-AC motor; the PLC controller 1 controls the solenoid valve D1 to open the pneumatic device Q1, and at the same time controls the servo motor S1, servo motor S2, and servo motor S3 to adsorb the LCD screen of the mobile terminal to be marked and recycled and move it to the next station. The PLC controller 1 transmits the signal to the PLC controller 2;

[0027] STEP5: After the next station receives the mobile terminal LCD screen to be marked, the PLC controller 2 controls the stepper motor B1 and the stepper motor B2 to make the straight push rod device (two T-shaped push rods) push and position in a straight line; the pressure sensor Y1 and the pressure sensor Y2 are located at the end of the push rod. When the pressure reaches the threshold, the PLC controller 2 is triggered to execute the program, and the stepper motor B1 and the stepper motor B2 are self-locked to complete the positioning;

[0028] STEP6: The upper computer's execution program controls the industrial camera g2 to turn on, further identifies the type of mobile terminal LCD screen to be marked and recycled, and transmits the information to the inkjet printer. The PLC controller 1 controls the stepper motor B3 to enable the inkjet printer to perform mobile inkjet printing based on the information identified twice. After the inkjet printing is completed, the PLC controller 2 controls the solenoid valve D2 to disconnect the pneumatic device Q2, and at the same time delays the triggering of the execution program to control the stepper motor B1 to push the straight-moving push rod to push the mobile terminal LCD screen that has been automatically marked and coded into the storage device.

[0029] The automatic control system and method for recycling the logo of the mobile terminal liquid crystal screen realizes a series of automatic control operations of conveying, photographing, signal transmission, and coding and marking the mobile terminal liquid crystal screen through the reasonable arrangement of the host computer, PLC controller, industrial camera, solenoid valve, relay, conveyor belt-AC motor, servo motor, pneumatic device, three-coordinate slide, stepper motor, linear push rod device, coding device, pressure sensor, and photoelectric sensor. The mobile terminal liquid crystal screen to be recycled with the logo can be recycled quickly and efficiently. The whole process requires only a few manual operations, which conforms to the modern process flow and improves the work efficiency.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic control method for recycling mobile terminal LCD screen logos, characterized in that: Including host computer, PLC controller 1, PLC controller 2, industrial camera g1, industrial camera g2, solenoid valve D1, solenoid valve D2, relay, servo motor S1, servo motor S2, servo motor S3, pneumatic device Q1, pneumatic device Q2, conveyor belt-AC motor, three-coordinate slide, stepper motor B1, stepper motor B2, stepper motor B3, straight push rod device, inkjet device, pressure sensor Y1, pressure sensor Y2, photoelectric sensor G1 and photoelectric sensor G2; The automatic control method is as follows: STEP1: The host computer starts, reads the address of PLC controller 1 and initializes it; STEP2: The conveyor belt-AC motor is started, and the LCD screen of the mobile terminal to be marked for recycling is placed on the conveyor belt for transmission; STEP3: The LCD screen of the mobile terminal to be marked on the conveyor belt passes under the photoelectric sensor G1, triggering the photoelectric sensor G1 and transmitting the signal to the PLC controller 1. The PLC controller 1 reads the signal and delays the stop control of the conveyor belt-AC motor. At the same time, the host computer executes the program to read the signal of the PLC controller 1, turns on the control industrial camera g1 and obtains its image information, and then turns it off after obtaining it. The host computer performs image recognition on the image information to obtain the size information and clarify the position where the code can be sprayed. The delay program in the PLC controller 1 triggers the conveyor belt-AC motor to start again. STEP 4: The LCD screen of the mobile terminal to be marked and recycled on the conveyor belt passes under the photoelectric sensor G2, triggering the photoelectric sensor G2 and transmitting the signal to the PLC controller 1. The PLC controller 1 reads the signal and performs a delayed stop control on the conveyor belt-AC motor; the PLC controller 1 controls the solenoid valve D1 to open the pneumatic device Q1, and at the same time controls the servo motor S1, servo motor S2, and servo motor S3 to adsorb the LCD screen of the mobile terminal to be marked and recycled and move it to the next station. The PLC controller 1 transmits the signal to the PLC controller 2; STEP5: After the next station receives the mobile terminal LCD screen to be marked, the PLC controller 2 controls the stepper motor B1 and the stepper motor B2 to make the straight-moving push rod device push and position in a straight line; the pressure sensor Y1 and the pressure sensor Y2 are located at the end of the push rod. When the pressure reaches the threshold, the PLC controller 2 is triggered to execute the program, and the stepper motor B1 and the stepper motor B2 are self-locked to complete the positioning; STEP6: The upper computer's execution program controls the industrial camera g2 to turn on, further identifies the type of mobile terminal LCD screen to be marked and recycled, and transmits the information to the inkjet printer. The PLC controller 1 controls the stepper motor B3 to enable the inkjet printer to perform mobile inkjet printing based on the information identified twice. After the inkjet printing is completed, the PLC controller 2 controls the solenoid valve D2 to disconnect the pneumatic device Q2, and at the same time delays the triggering of the execution program to control the stepper motor B1 to push the straight-moving push rod to push the mobile terminal LCD screen that has been automatically marked and coded into the storage device.

2. The automatic control method for recycling mobile terminal LCD screen logo according to claim 1, characterized in that: The PLC controller 1, solenoid valve D1, relay, servo motor S1, servo motor S2, servo motor S3, stepper motor B3, pneumatic device Q1, conveyor belt-AC motor, three-coordinate slide, inkjet device, photoelectric sensor G1, photoelectric sensor G2, and industrial camera g1 constitute a first control execution module. The multiple output ends of the PLC controller 1 are respectively connected to the input ends of the PLC controller 2, solenoid valve D1, relay, servo motor S1, servo motor S2, servo motor S3 and stepper motor B3. The output ends of the host computer and the stepper motor B3 are both connected to the input end of the inkjet device. The host computer and the PLC controller 1 are bidirectionally connected. The output ends of the photoelectric sensor G1 and the photoelectric sensor G2 are both connected to the input end of the PLC controller 1. The output end of the solenoid valve D1 is connected to the input end of the pneumatic device Q1. The output end of the relay is connected to the input end of the conveyor belt-AC motor. The output ends of the servo motor S1, servo motor S2, and servo motor S3 are all connected The input end of the three-coordinate slide is connected, and the first control execution module detects the position of the mobile terminal LCD screen to be marked and recycled on the conveyor belt through the photoelectric sensor G1 and the photoelectric sensor G2, and uses the PLC controller 1 to read the transmission position information to the host computer and make the following control: use the execution program of the host computer to control the on and off of the industrial camera g1 to identify the type of the mobile terminal LCD screen to be marked and recycled; use the relay to control the start and stop movement of the conveyor belt-AC motor to realize the start and stop movement of the conveyor belt; use the solenoid valve D1 to control the on and off of the pneumatic device Q1 to realize the adsorption and placement of the mobile terminal LCD screen to be marked and recycled; use the servo motor S1, servo motor S2, and servo motor S3 to control the three-coordinate slide to adsorb the mobile terminal LCD screens to be marked and recycled of different sizes and transmit them to different stations; use the stepper motor B3 to control the position of the inkjet device to realize the automatic conversion of the inkjet position according to the type of the mobile terminal LCD screen to be marked and recycled, and at the same time use the host computer to transmit the specific type of the mobile terminal LCD screen to be marked that has been image-recognized to the inkjet device for marking and inkjet coding.

3. The automatic control method for recycling mobile terminal LCD screen logo according to claim 1, characterized in that: The PLC controller 2, solenoid valve D2, stepper motor B1, stepper motor B2, pneumatic device Q2, straight-moving push rod device, pressure sensor Y1, pressure sensor Y2, and industrial camera g2 constitute a second control execution module. The multiple output ends of the PLC controller 2 are respectively connected to the input ends of the solenoid valve D2, stepper motor B1, and stepper motor B2. The output end of the solenoid valve D2 is connected to the input end of the pneumatic device Q2. The output ends of the stepper motor B1 and stepper motor B2 are both connected to the input end of the straight-moving push rod device. The output ends of the pressure sensor Y1 and pressure sensor Y2 are both connected to the input end of the PLC controller 2. The industrial cameras g1 and g2 are bidirectionally connected to the host computer. The second The control execution module determines the type of the mobile terminal LCD screen to be marked and recycled transmitted by the first control execution module through the host computer, transmits the signal to PLC controller 2 through PLC controller 1, and uses PLC controller 2 to read the signal and make the following control: use the execution program of the host computer to control the on and off of the industrial camera g2 to further identify the type of the mobile terminal LCD screen to be marked and recycled; use the solenoid valve D2 to control the on and off of the pneumatic device Q2 to achieve the limit of the mobile terminal LCD screen to be marked and recycled; use the stepper motor B1 and the stepper motor B2 to control the straight-moving push rod device to achieve the positioning and transfer of the mobile terminal LCD screen to be marked and recycled, and the pressure sensor Y1 and the pressure sensor Y2 feedback the pressure signal to ensure that the mobile terminal LCD screen to be marked and recycled will not be squeezed and damaged.

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