Luggage buffer and use method

Abstract

The invention relates to the field of luggage conveying, and discloses a luggage buffer and a using method, and the luggage buffer comprises a sensor system which comprises a first photoelectric sensing unit and is used for transmitting a first detection signal to a control module; and the second photoelectric sensing unit transmits a second detection signal to the control module. Through cooperative arrangement of the upper photoelectric sensor and the left photoelectric sensor, the buffer can judge whether the buffer pad extends out or not according to the specific incoming goods conditions of the upper side and the left side, it is guaranteed that the buffer pad cannot block goods on the left side, meanwhile, the goods on the upper side are buffered according to the conditions, and the applicability of the buffer is improved; through the arrangement of the pressure unit, the buffer can adjust the retraction speed of the buffer cushion according to the impact force of goods, so that the dynamic adjustment of the buffer cushion is realized, and the damage of the impact force to the luggage case can be reduced to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the field of luggage transportation, and in particular to a luggage buffer and a usage method thereof. Background Art

[0002] In luggage transportation, there will be a situation where conveying devices are used in combination. For example Figure 8 In the situation shown in, the left conveyor belt conveys the luggage on the left to the right, and the upper conveyor belt conveys the luggage in another direction to the left conveyor belt. The combined use of the left conveyor belt and the upper conveyor belt enables the luggage in two directions to be aggregated and conveyed to the right, facilitating the aggregated pick-up of the luggage in two directions on the right.

[0003] However, when the left conveyor belt and the upper conveyor belt are used in combination, since the joint between the upper conveyor belt and the left conveyor belt needs to be higher than the left conveyor belt, when the upper luggage falls from the upper conveyor belt to the left conveyor belt, it is likely to slide off the left conveyor belt. Therefore, a luggage buffer is required, which can not only prevent the upper luggage from sliding, but also buffer the upper luggage.

[0004] Although the existing luggage buffer can buffer the luggage, it cannot perform telescopic arm buffering according to specific situations. When the luggage buffer detects the incoming luggage on the left, the luggage buffer cannot perform telescopic arm buffering, otherwise it may get stuck with the left luggage. When the luggage buffer detects the incoming upper luggage and there is no luggage on the left, the luggage buffer can extend its arm to perform telescopic arm buffering on the upper luggage to ensure the normal transportation of the luggage. Therefore, a luggage buffer that can perform telescopic arm buffering according to specific situations is needed. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that the existing luggage buffer cannot perform telescopic arm buffering according to specific situations.

[0006] The above technical problem is solved by the following technical solution: The present invention provides a luggage buffer, comprising,

[0007] A sensor system, including a first optoelectronic sensing unit that transmits a first detection signal to a control module;

[0008] A second optoelectronic sensing unit that transmits a second detection signal to the control module;

[0009] When the control module only receives the first detection signal, the control module issues a first control signal. When the control module only receives the second detection signal, the control module issues a second control signal. When the control module receives both the first detection signal and the second detection signal, the control module issues a first control signal; and,

[0010] A servo system is configured to receive a first control signal and a second control signal from a control module. When the servo system receives the first control signal, it executes a command to retract the buffer pad. When the servo system receives the second control signal, it executes a command to extend the buffer pad.

[0011] In a preferred embodiment of the luggage buffer of the present invention: The sensor system further includes a pressure unit for detecting the pressure exerted on the buffer pad and transmitting a pressure signal to the control module.

[0012] The control module receives the pressure signal and calculates the telescopic speed of the buffer pad based on the magnitude of the pressure signal.

[0013] In a preferred embodiment of the luggage buffer of the present invention: The sensor system further includes a limit unit for detecting the positive limit and negative limit of the swing arm.

[0014] In a preferred embodiment of the luggage buffer of the present invention: The first optoelectronic sensing unit includes a left diffuse reflection optoelectronic sensor and a left opposed beam optoelectronic sensor. The second optoelectronic sensing unit includes an upper diffuse reflection optoelectronic sensor and an upper opposed beam optoelectronic sensor. The limit unit includes a slot-type optoelectronic positive limit sensor and a slot-type optoelectronic negative limit sensor.

[0015] In a preferred embodiment of the luggage buffer of the present invention: It further includes

[0016] A power supply module for providing power to the system;

[0017] A human-machine interaction system for displaying the system status and allowing an operator to perform control;

[0018] The human-machine interaction system is communicatively connected to the control module via Profinet.

[0019] In a preferred embodiment of the luggage buffer of the present invention: The power supply module includes a drive power supply for providing power to the sensor system, the control module, the servo system, and the human-machine interaction system.

[0020] In a preferred embodiment of the luggage buffer of the present invention: The control module has a plurality of input ports and output ports;

[0021] Each sensor in the sensor system has three ports, two of which are power ports connected to the power supply module, and one port is a signal port connected to the input port of the control module.

[0022] In a preferred embodiment of the luggage buffer of the present invention: The servo system includes a driver and a servo motor;

[0023] The driver is connected to the servo motor through the CN2 connecting line;

[0024] The driver is connected to the control module through Profinet communication.

[0025] In a preferred embodiment of the luggage buffer according to the present invention: a drive port is provided on the driver, and the drive port includes U, V, W, and PE ports, which are respectively connected to the corresponding power ports of the servo motor for providing three-phase alternating current to the servo motor;

[0026] A brake + port is provided on the servo motor, and the brake + port of the servo motor is connected to the output port of the control module for receiving a brake control signal;

[0027] A brake - port is provided on the servo motor, and the brake - port of the servo motor is connected to the positive pole of the power supply for providing power to the brake system.

[0028] A method for using a luggage buffer includes the following steps:

[0029] Step 1, startup: Start the power module to supply power to the luggage buffer system;

[0030] Step 2, detect luggage: Receive the signal of the left photoelectric sensor through the control module to determine whether there is luggage coming from the left, and receive the signal of the upper photoelectric sensor through the control module to determine whether there is luggage coming from the upper side;

[0031] Step 3, buffer pad action: The control module controls the servo system to extend or retract the buffer pad according to the signals of the left photoelectric sensor and the upper photoelectric sensor. When the buffer pad needs to extend, the servo system makes the buffer pad extend with a time delay according to the time delay algorithm;

[0032] Step 4, pressure detection: When the buffer pad extends and contacts the luggage case, use the pressure unit to detect the pressure of the luggage case on the buffer pad;

[0033] Step 5, dynamic adjustment: The control module dynamically adjusts the extension and retraction speed of the buffer pad according to the signal of the pressure unit.

[0034] In a preferred embodiment of the method for using the luggage buffer according to the present invention: In step 2, when it is detected that luggage is coming from the left, activate the brake system to prevent the buffer pad from extending;

[0035] When it is detected that luggage is coming from the upper side and there is no luggage on the left, control the servo motor to rotate to make the buffer pad extend.

[0036] In a preferred embodiment of the method for using the luggage buffer of the present invention: the telescopic speed of the buffer pad is calculated through an internal algorithm using the pressure value detected by the pressure unit, and the rotation speed of the servo motor is adjusted to achieve dynamic adjustment of the buffer pad.

[0037] The beneficial effects of the present invention are as follows: Through the cooperative setting of the upper photoelectric sensor and the left photoelectric sensor, the buffer can determine whether the buffer pad extends according to the specific incoming goods situation above and on the left, ensuring that the buffer pad does not block the goods on the left, and at the same time buffering the goods above according to the situation, increasing the applicability of the buffer.

[0038] Through the setting of the pressure unit, the buffer can adjust the retraction speed of the buffer pad according to the impact force of the goods, realizing the dynamic adjustment of the buffer pad, and can minimize the damage to the luggage caused by the impact force to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0040] Figure 1 Shows the communication schematic diagram of the control module;

[0041] Figure 2 Shows the circuit connection schematic diagram of the luggage buffer;

[0042] Figure 3 Shows the connection schematic diagram of the sensor system;

[0043] Figure 4 Shows the connection schematic diagram of the control module;

[0044] Figure 5 Shows the connection schematic diagram of the servo system;

[0045] Figure 6 Shows the structural schematic diagram of the luggage buffer;

[0046] Figure 7 Shows the connection schematic diagram of the servo motor and the swing arm;

[0047] Figure 8 Shows the usage scenario diagram of the luggage buffer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the specific embodiments and the drawings.

[0049] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention. However, these terms may vary according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0050] Referring to Figure 6 and Figure 7 , a brief introduction to the luggage buffer will be given next.

[0051] The luggage buffer includes a buffer body 601, a swing arm 602 disposed on the buffer body 601, a buffer pad 603 disposed on the swing arm 602, and a servo motor 604 disposed on the buffer body 601 and connected to the swing arm 602.

[0052] The servo motor 604 drives the swing arm 602 to rotate, thereby controlling the extension and retraction of the buffer pad 603.

[0053] Referring to Figure 1 , this embodiment provides a luggage buffer, including a sensor system 300, a control module 200, and a servo system 400.

[0054] Among them, the sensor system 300 includes a first photoelectric sensing unit 301 that transmits a first detection signal A to the control module 200, and a second photoelectric sensing unit 302 that transmits a second detection signal B to the control module 200.

[0055] When the control module 200 only receives the first detection signal A, the control module 200 issues a first control signal S. When the control module 200 only receives the second detection signal B, the control module 200 issues a second control signal N. When the control module 200 receives both the first detection signal A and the second detection signal B at the same time, the control module 200 issues a first control signal S.

[0056] The servo system 400 is used to receive the first control signal S and the second control signal N issued by the control module 200. When the servo system 400 receives the first control signal S, the servo system 400 executes the command to make the buffer pad in the retracted state. When the servo system 400 receives the second control signal N, the servo system 400 executes the command to make the buffer pad in the extended state.

[0057] Among them, the first optoelectronic sensing unit 301 is used to detect the goods coming from the left. When the first optoelectronic sensing unit 301 detects that there are goods on the left, the first optoelectronic sensing unit 301 sends the first detection signal A. The second optoelectronic sensing unit 302 is used to detect the goods coming from above. When the second optoelectronic sensing unit 302 detects that there are goods above, the second optoelectronic sensing unit 302 sends the second detection signal B.

[0058] If the control module 200 only receives the first detection signal A, it means that there are goods arriving on the left side of the buffer, while there are no goods arriving above. In order for the goods on the left to pass through the buffer smoothly, the control module 200 issues the first control signal S to make the buffer pad in the retracted state.

[0059] If the control module 200 only receives the second detection signal B, it means that there are goods arriving above the buffer, while there are no goods arriving on the left. In order to buffer the goods above, the control module 200 issues the second control signal N to make the buffer pad in the extended state, so as to buffer the goods.

[0060] If the control module 200 receives both the first detection signal A and the second detection signal B at the same time, it means that there are goods arriving both above and on the left side of the buffer. In order for the goods on the left to pass through smoothly, the control module 200 issues the first control signal S to make the buffer pad in the retracted state.

[0061] Refer to Figure 1 , the sensor system 300 further includes a pressure unit 304.

[0062] Among them, the pressure unit 304 is used to detect the pressure received by the buffer pad and transmit the pressure signal Y to the control module 200.

[0063] The control module 200 receives the pressure signal Y and processes it. The control module 200 calculates the telescopic speed of the buffer pad through an internal algorithm according to the magnitude of the pressure signal Y.

[0064] Among them, the pressure unit 304 can adopt a pressure sensor to send the pressure signal Y to the control module 200. The pressure unit 304 sends the detected pressure value to the control module 200 in real time. The control module 200 reads the pressure value in real time and processes it. The control module 200 calculates the appropriate telescopic speed of the buffer pad through an internal algorithm according to the magnitude of the pressure value. The control module 200 adjusts the telescopic speed of the buffer pad in real time through the servo system 400, so as to minimize the damage to the luggage caused by the impact force.

[0065] The control module 200 is connected to the sensor system 300 through IO control and is connected to the servo system 400 through Profinet communication.

[0066] Among them, the control module 200 is connected to the sensor system 300 through input / output (IO) ports. Signals from the sensor system 300 (such as signals detected by the photoelectric sensor) are input into the control module 200 through these IO ports, and the control module 200 processes and makes decisions based on these input signals.

[0067] The control module 200 communicates with the servo system 400 using the Profinet protocol. Profinet is a communication protocol based on industrial Ethernet, used to achieve high-speed data exchange between automation devices. Through Profinet communication, the control module 200 can send control instructions to the servo system 400.

[0068] Refer to Figure 2 , a luggage buffer, further includes a power supply module 100 and a human-machine interaction system 500.

[0069] Among them, the power supply module 100 is used to provide power for the system. The human-machine interaction system 500 is used to display the system status and allow the operator to perform control.

[0070] The human-machine interaction system 500 is connected to the control module 200 through Profinet communication.

[0071] The human-machine interaction system 500 is an interface for interaction between the operator and the control module 200. It usually includes a touch screen, an operation panel or a computer interface, used to display information such as system status, parameter settings, and fault diagnosis. The main functions of the human-machine interaction system include: real-time display of the system's operating status, such as the position of the buffer pad, sensor status, motor speed, etc. Allowing the operator to set system parameters, such as the extension speed of the buffer pad, pressure threshold, etc. Displaying system fault information to help the operator quickly locate and solve problems. Allowing the operator to manually control the operation of the system, such as start, stop, reset, etc.

[0072] The power supply module 100 includes a driving power supply 101, which provides power for the sensor system 300, the control module 200, the servo system 400, and the human-machine interaction system 500.

[0073] Refer to Figure 2 and Figure 3 , the sensor system 300 further includes a limit unit 303, used to detect the positive limit and negative limit of the swing arm. The limit unit 303 includes a groove-type photoelectric positive limit sensor 303a and a groove-type photoelectric negative limit sensor 303b.

[0074] The first photoelectric sensing unit 301 includes a left diffuse reflection photoelectric sensor 301a and a left opposed photoelectric sensor 301b, and the second photoelectric sensing unit 302 includes an upper diffuse reflection photoelectric sensor 302a and an upper opposed photoelectric sensor 302b.

[0075] Among them, the first photoelectric sensing unit 301 is used to detect incoming goods from the left. The second photoelectric sensing unit 302 is used to detect incoming goods from above. The limit unit 303 is used to detect the positive limit and negative limit of the swing arm. The pressure unit 304 is used to detect the pressure of the luggage on the buffer pad.

[0076] Next, the extension and retraction of the buffer pad of the luggage buffer in different scenarios will be described.

[0077] In Scenario 1, when the first photoelectric sensing unit 301 is triggered and the second photoelectric sensing unit 302 is not triggered, the first photoelectric sensing unit 301 and the second photoelectric sensing unit 302 send signals to the control module 200, and the control module 200 controls the servo system 400 to retract the buffer pad.

[0078] In Scenario 2, when the first photoelectric sensing unit 301 is triggered and the second photoelectric sensing unit 302 is triggered, the first photoelectric sensing unit 301 and the second photoelectric sensing unit 302 send signals to the control module 200, and the control module 200 controls the servo system 400 to retract the buffer pad.

[0079] In Scenario 3, when the first photoelectric sensing unit 301 is not triggered and the second photoelectric sensing unit 302 is triggered, the first photoelectric sensing unit 301 and the second photoelectric sensing unit 302 send signals to the control module 200, and the control module 200 controls the servo system 400 to extend the buffer pad.

[0080] Table 1 Actions of the buffer pad in different scenarios

[0081]

[0082] Refer to Figures 2 - 4 , the first photoelectric sensing unit 301 includes a left diffuse reflection photoelectric sensor 301a and a left opposed photoelectric sensor 301b, the second photoelectric sensing unit 302 includes an upper diffuse reflection photoelectric sensor 302a and an upper opposed photoelectric sensor 302b, and the limit unit 303 includes a slot-type photoelectric positive limit sensor 303a and a slot-type photoelectric negative limit sensor 303b.

[0083] Among them, the left diffuse reflection photoelectric sensor 301a is used to detect whether there is incoming luggage on the left. The left diffuse reflection photoelectric sensor 301a emits light and receives the light reflected from the surface of the object to determine the presence of the object. It is suitable for irregular or transparent objects. The left opposed photoelectric sensor 301b is also used to detect whether there is incoming luggage on the left, but its working principle is different from that of diffuse reflection. It is suitable for detecting the passage of objects, especially when the object completely blocks the light. The setting of the two left sensors can provide double confirmation and reduce the possibility of misjudgment.

[0084] The upper diffuse reflection photoelectric sensor 302a is used to detect whether there is incoming luggage above. The upper diffuse reflection photoelectric sensor 302a emits light and receives the light reflected from the surface of the object, thereby judging the presence of the object. It is applicable to irregular or transparent objects. The upper through-beam photoelectric sensor 302b is also used to detect whether there is incoming luggage above and is applicable to detecting the passage of an object. The setting of the two upper sensors can provide double confirmation and reduce the possibility of misjudgment.

[0085] The slot-type photoelectric positive limit sensor 303a is used to detect the positive limit position of the buffer swing arm to prevent the swing arm from exceeding the designed range. The slot-type photoelectric negative limit sensor 303b is used to detect the negative limit position of the buffer swing arm to prevent the swing arm from exceeding the designed range.

[0086] Next, the extension and retraction of the buffer pad of the luggage buffer in different scenarios will be described through a table.

[0087] Table 2 shows the relationship between the triggered states of the left diffuse reflection photoelectric sensor 301a, the left through-beam photoelectric sensor 301b, the upper diffuse reflection photoelectric sensor 302a, and the upper through-beam photoelectric sensor 302b and the buffer pad in different scenarios.

[0088] Table 2 Actions of the buffer pad in different scenarios

[0089]

[0090] Reference Figures 2 - 4 , the control module 200 has a number of input ports 201 and output ports 202. These ports are the interfaces for the control module 200 to communicate with external devices.

[0091] Among them, the input port 201 includes but is not limited to I0.0 port, I0.1 port, I0.2 port, I0.3 port, I0.4 port, I0.5 port, I0.6 port, L+ port and M port. The I0.0 port is connected to the left diffuse reflection photoelectric sensor 301a to receive the incoming goods signal from the left. The I0.1 port is connected to the left opposed photoelectric sensor 301b to receive the incoming goods signal from the left. The I0.2 port is connected to the upper diffuse reflection photoelectric sensor 302a to receive the incoming goods signal from above. The I0.3 port is connected to the upper opposed photoelectric sensor 302b to receive the incoming goods signal from above. The I0.4 port is connected to the slot-type photoelectric positive limit sensor 303a to receive the positive limit signal of the swing arm. The I0.5 port is connected to the slot-type photoelectric negative limit sensor 303b to receive the negative limit signal of the swing arm. The I0.6 port is connected to the pressure unit 304 to receive the pressure value detected by the pressure unit 304. The L+ port and M port are the power input ports of the control module 200, used to connect the positive and negative poles of the power module 100 to provide power for the control module 200.

[0092] The output port 202 includes but is not limited to Q0.0 port, 1L+ port and 1M port. The Q0.0 port is connected to the brake + port of the servo motor 402 to send the brake control signal. The 1L+ port and 1M port are the power input ports of the control module 200, used to connect the positive and negative poles of the power module 100 to provide power for the control module 200.

[0093] Reference Figure 2 and Figure 4 In the sensor system 300, various sensors all have three ports, two of which are power ports connected to the power module 100, and one port is a signal port connected to the input port 201 of the control module 200.

[0094] Among them, one power port is connected to the positive pole of the power module 100, and the other power port is connected to the negative pole of the power module 100. The power ports are the No. 1 port and No. 2 port. The signal port is the No. 3 port. The signal port is respectively connected to the I0.0 port, I0.1 port, I0.2 port, I0.3 port, I0.4 port, I0.5 port and I0.6 port, so that the control module 200 can receive the signals of the sensor system 300.

[0095] Refer to Figure 2 and Figure 5 In the servo system 400, it includes a driver 401 and a servo motor 402. The driver 401 and the servo motor 402 are connected by the CN2 connection line.

[0096] Among them, the CN2 connection line is the main connection line between the driver 401 and the servo motor 402, used to transmit control signals and feedback signals. It usually includes a power line, a control signal line, and a feedback signal line. The control signal line is used to receive control instructions from the driver, and the feedback signal line is used to feedback information such as the position and speed of the motor to the driver.

[0097] The driver 401 and the control module 200 are connected through Profinet communication.

[0098] Next, an explanation will be given on how the servo motor 402 adjusts the pressure between the buffer pad and the trunk according to the pressure unit 304.

[0099] When the judged action of the buffer pad is to extend, the servo motor 402 will not act immediately, but will start a delay process. This is to ensure that the trunk has fallen stably to the designated position before the buffer acts, avoiding instability or damage to the trunk caused by the premature action of the buffer.

[0100] We first need to consider the forces acting on the object. In this case, there are two main forces, the gravitational force (mg) and the frictional force (f). The gravitational force can be decomposed into two components, one parallel to the inclined plane (mgsinθ) and the other perpendicular to the inclined plane (mgcosθ). The frictional force is parallel to the inclined plane but in the opposite direction, and its magnitude is equal to the coefficient of friction μ multiplied by the normal force N. Here, the normal force is equal to the vertical component mgcosθ of the object's weight. Therefore, the frictional force f = μ * N = μ * mgcosθ, and the net force F along the inclined plane will be the parallel component of the gravitational force minus the frictional force: F = mgsinθ - μmgcosθ. Since F = ma (Newton's second law), we can obtain the acceleration a = g(sinθ - μcosθ). Substituting the expression of a into the displacement formula for uniformly accelerated motion can obtain the formula for the delay time.

[0101] The delay formula comprehensively considers factors such as the object's weight, initial velocity, inclined plane length, coefficient of friction, and inclination angle. The delay time is calculated through the delay formula, and the delay formula is:

[0102]

[0103] Among them, T represents the delay time.

[0104] L represents the inclined plane length.

[0105] g represents the acceleration due to gravity.

[0106] θ represents the inclination angle of the inclined plane.

[0107] μ represents the coefficient of friction of the inclined plane, which is a dimensionless value.

[0108] According to the formula for calculation, when the swing arm 602 extends to the maximum stroke, the luggage case just touches the buffer pad 603. A pressure unit 304 is installed under the buffer pad 603 to detect the pressure of the luggage case on the buffer pad 603. The pressure unit 304 sends the detected pressure value to the control module 200 in real time.

[0109] The signal port of the pressure unit 304 is connected to the I0.6 port in the input port 201 of the control module 200, and sends the detected pressure value to the control module 200 in real time. The control module 200 reads the pressure value in real time and processes it. According to the magnitude of the pressure value, the control module 200 calculates the appropriate telescopic speed of the buffer pad 603 through an internal algorithm. The control module 200 sends a control instruction to the driver 401 through Profinet communication to adjust the speed of the servo motor 402. After receiving the instruction from the control module 200, the driver 401 adjusts the current or voltage of the servo motor 402, thereby changing the speed of the servo motor 402. The servo motor 402 drives the swing arm 602 to move according to the new speed instruction, realizing the telescopic movement of the buffer pad 603. Through Profinet communication, the control module 200 exchanges data with the servo driver 401 to accurately control the speed and direction of the servo motor 402, realizing the dynamic adjustment of the buffer pad 603, and can minimize the damage to the luggage case caused by the impact force.

[0110] A drive port 401a is provided on the driver 401. The drive port 401a includes U, V, W, and PE ports, which are respectively connected to the corresponding power ports of the servo motor 402 to provide three-phase alternating current to the servo motor 402.

[0111] Among them, the U, V, and W ports are the three phase wire ports of the three-phase alternating current, which are used to provide three-phase alternating current to the servo motor 402. The PE port is the protective grounding port, which is used to ensure the safety grounding of the system. The U, V, and W ports are connected to the corresponding power ports of the servo motor. The PE port is connected to the grounding port of the servo motor.

[0112] A brake + port 402a is provided on the servo motor 402. The brake + port 402a of the servo motor 402 is connected to the output port 202 of the control module 200 to receive the brake control signal.

[0113] A brake - port 402b is provided on the servo motor 402. The brake - port 402b of the servo motor 402 is connected to the positive pole of the power supply to provide power for the brake system.

[0114] Among them, the braking system is usually integrated inside the servo motor 402 and is an independent functional module. When the brake + port 402a receives a control signal, the braking system is activated, and the braking device, usually an electromagnetic brake, will quickly fix the rotor of the motor to prevent the motor from rotating freely. The brake - port 402b supplies power to ensure that the braking device can work properly.

[0115] After the motor stops, the braking system can keep the motor in a stationary state and prevent the motor from rotating accidentally due to external forces.

[0116] Next, the signal transmission will be introduced.

[0117] The first photoelectric sensing unit 301 and the second photoelectric sensing unit 302 send out the first detection signal A and the second detection signal B through port 3. The control module 200 receives the first detection signal A and the second detection signal B through the input port 201. Since the I0.0 port is connected to the left diffuse reflection photoelectric sensor 301a, the I0.1 port is connected to the left opposed photoelectric sensor 301b, the I0.2 port is connected to the upper diffuse reflection photoelectric sensor 302a, and the I0.3 port is connected to the upper opposed photoelectric sensor 302b. Therefore, the control module 200 receives the first detection signal A through the I0.0 port and the I0.1 port, and receives the second detection signal B through the I0.2 port and the I0.3 port.

[0118] The control module 200 sends the first control signal S or the second control signal N to the driver 401 through Profinet communication. When the driver 401 receives the first control signal S, the driver 401 will not drive the servo motor 402 to rotate, making the buffer pad in the retracted state. When the driver 401 receives the second control signal N, the driver 401 drives the servo motor 402 to rotate, making the buffer pad in the extended state.

[0119] The pressure unit 304 sends out the pressure signal Y through port 3. The control module 200 receives the pressure signal Y through the input port 201. Since the I0.6 port is connected to port 3 of the pressure unit 304, the control module 200 receives the pressure signal Y through the I0.6 port.

[0120] The control module 200 reads the pressure signal Y in real time and processes it. The control module 200 calculates the appropriate buffer pad expansion and contraction speed through an internal algorithm according to the magnitude of the pressure value. The control module 200 sends a control instruction to the driver 401 through Profinet communication to adjust the rotation speed of the servo motor 402.

[0121] While the control module 200 sends the first control signal S to the driver 401 through Profinet communication, the control module 200 sends a signal to the brake + port of the servo motor 402 through the output port 202, activating the braking system. The braking device fixes the rotor of the motor to prevent the motor from rotating freely. While the control module 200 sends the second control signal N to the driver 401 through Profinet communication, the control module 200 does not send a signal to the brake + port of the servo motor 402 through the output port 202, enabling the driver 401 to drive the servo motor 402 to rotate.

[0122] Usage method of the luggage buffer.

[0123] Before the luggage buffer is put into use, system initialization is carried out first. The operator starts the power module 100 through the human-machine interaction system 500 to supply power to the entire system. After the system self-check is completed, the ready state is displayed.

[0124] The operator calibrates the sensor system 300 through the human-machine interaction system 500 to ensure the accuracy and sensitivity of the first photoelectric sensing unit 301, the second photoelectric sensing unit 302, the limit unit 303, and the pressure unit 304. During the calibration process, the system will display the sensor status to ensure that all sensors are working properly.

[0125] The operator selects the operation mode through the human-machine interaction system 500 according to actual needs. The luggage buffer provides two main operation modes: automatic mode: the system automatically controls the extension and retraction of the buffer pad according to the sensor signals. Manual mode: the operator manually controls the actions of the buffer pad, which is suitable for special situations or maintenance.

[0126] In the automatic mode, the system operates according to the following process:

[0127] When the first photoelectric sensing unit 301 detects the incoming goods from the left, the signal is sent to the control module 200. The control module 200 activates the braking system to stop the servo motor 402, and the buffer pad is in the retracted state to avoid collision with the left luggage.

[0128] When the second photoelectric sensing unit 302 detects the incoming goods from above and the first photoelectric sensing unit 301 does not detect the incoming goods from the left, the signal is sent to the control module 200. The control module 200 sends an instruction to the driver 401 through Profinet communication to drive the servo motor 402 to rotate, causing the buffer pad to extend to prepare to catch the upper luggage.

[0129] The servo motor 402 drives the swing arm 602 to rotate, and the buffer pad 603 extends. When the swing arm reaches the maximum stroke, the suitcase just touches the buffer pad. At this time, the pressure unit 304 detects the pressure and sends the signal to the control module 200.

[0130] Based on the signal from the pressure unit 304, the control module 200 calculates the appropriate telescopic speed of the buffer pad through an internal algorithm, and sends a control instruction to the driver 401 via Profinet communication to adjust the rotational speed of the servo motor 402, realizing the dynamic adjustment of the buffer pad to reduce the damage to the luggage caused by the impact force.

[0131] In the manual mode, the operator can directly control the extension and retraction of the buffer pad through the human-machine interaction system 500. This mode is applicable to special situations or system maintenance.

[0132] After the operation is completed, the operator turns off the power module 100 through the human-machine interaction system 500, and the system performs self-check and safely shuts down all actuators.

[0133] Finally, it should be noted that the methods and devices described in detail above are only examples, and those skilled in the art can modify these examples in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A luggage buffer, characterized in that: including, a sensor system (300), including a first optoelectronic sensing unit (301) that delivers a first detection signal (A) to a control module (200); a second optoelectronic sensing unit (302) that delivers a second detection signal (B) to the control module (200); when the control module (200) only receives the first detection signal (A), the control module (200) issues a first control signal (S), when the control module (200) only receives the second detection signal (B), the control module (200) issues a second control signal (N), when the control module (200) receives both the first detection signal (A) and the second detection signal (B) simultaneously, the control module (200) issues a first control signal (S); and, a servo system (400) for receiving the first control signal (S) and the second control signal (N) issued by the control module (200), when the servo system (400) receives the first control signal (S), the servo system (400) executes a command to make the buffer pad in a retracted state, when the servo system (400) receives the second control signal (N), the servo system (400) executes a command to make the buffer pad in an extended state.

2. The luggage buffer according to claim 1, characterized in that: The sensor system (300) further includes a pressure unit (304) for detecting the pressure received by the buffer pad and delivering a pressure signal (Y) to the control module (200); The control module (200) receives the pressure signal (Y) and calculates the telescopic speed of the buffer pad according to the magnitude of the pressure signal (Y).

3. The luggage buffer according to claim 1 or 2, characterized in that: The sensor system (300) further includes a limit unit (303) for detecting the positive limit and negative limit of the swing arm.

4. The luggage buffer according to claim 3, wherein: The first optoelectronic sensing unit (301) includes a left diffuse reflection optoelectronic sensor (301a) and a left opposed beam optoelectronic sensor (301b), the second optoelectronic sensing unit (302) includes an upper diffuse reflection optoelectronic sensor (302a) and an upper opposed beam optoelectronic sensor (302b), and the limit unit (303) includes a slot type optoelectronic positive limit sensor (303a) and a slot type optoelectronic negative limit sensor (303b).

5. The luggage buffer according to any one of claims 1, 2, and 4, characterized in that: also including, a power supply module (100) for supplying power to the system; a human-machine interaction system (500) for displaying the system status and allowing an operator to perform control; The human-machine interaction system (500) is communicatively connected to the control module (200) via Profinet.

6. The luggage buffer according to claim 5, wherein: The power supply module (100) includes a drive power supply (101) for supplying power to the sensor system (300), the control module (200), the servo system (400), and the human-machine interaction system (500).

7. The luggage buffer according to claim 5, characterized in that: The control module (200) has a plurality of input ports (201) and output ports (202); All kinds of sensors in the sensor system (300) have three ports, two of which are power ports connected to the power supply module (100), and one port is a signal port connected to the input port (201) of the control module (200).

8. The luggage buffer according to any one of claims 1, 2, 4, 6, and 7, characterized in that: The servo system (400) includes a driver (401) and a servo motor (402); The driver (401) is connected to the servo motor (402) through a CN2 connection line; The driver (401) is connected to the control module (200) through Profinet communication.

9. The luggage buffer according to claim 8, characterized in that: A drive port (401a) is provided on the driver (401), and the drive port (401a) includes U, V, W, and PE ports, which are respectively connected to the corresponding power ports of the servo motor (402) to provide three-phase alternating current to the servo motor (402); A brake + port (402a) is provided on the servo motor (402), and the brake + port (402a) of the servo motor (402) is connected to the output port (202) of the control module (200) to receive a brake control signal; A brake - port (402b) is provided on the servo motor (402), and the brake - port (402b) of the servo motor (402) is connected to the positive pole of the power supply to provide power for the brake system.

10. A method for using a luggage buffer, characterized in that: It includes the following steps: Step 1, start: Start the power module to supply power to the luggage buffer system; Step 2, detect luggage: Receive the signal of the left photoelectric sensor through the control module to judge whether there is luggage coming from the left, and receive the signal of the upper photoelectric sensor through the control module to judge whether there is luggage coming from above; Step 3, buffer pad action: The control module controls the servo system to extend or retract the buffer pad according to the signals of the left photoelectric sensor and the upper photoelectric sensor. When the buffer pad needs to extend, the servo system makes the buffer pad extend with a time delay according to the time delay algorithm; Step 4, pressure detection: When the buffer pad extends and touches the luggage case, use the pressure unit to detect the pressure of the luggage case on the buffer pad; Step 5, dynamic adjustment: The control module dynamically adjusts the extension and retraction speed of the buffer pad according to the signal of the pressure unit.

11. The method for using a luggage buffer according to claim 10, wherein: In Step 2, when it is detected that luggage is coming from the left, activate the brake system to prevent the buffer pad from extending; When it is detected that luggage is coming from above and there is no luggage on the left, control the servo motor to rotate to make the buffer pad extend.

12. The method for using a luggage buffer according to claim 10 or 11, characterized in that: Calculate the extension and retraction speed of the buffer pad through the internal algorithm using the pressure value detected by the pressure unit, and adjust the rotation speed of the servo motor to achieve the dynamic adjustment of the buffer pad.

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