Motion state recognition device and ground cleaning equipment

Abstract

The utility model provides a motion state recognition device and ground cleaning equipment. The motion state recognition device comprises a machine body, a motion recognition assembly and an electric control assembly. The machine body has a first movement direction and a second movement direction. The activity recognition assembly comprises an acting piece, when the machine body moves in the first movement direction, the acting piece is stressed to move to the first position, and when the machine body moves in the second movement direction, the acting piece is stressed to move to the second position. The electric control assembly is arranged on the machine body, the acting piece at the first position is close to the electric control assembly relative to the acting piece at the second position, and the electric control assembly is used for generating a first identification signal when the acting piece is located at the first position and generating a second identification signal when the acting piece is located at the second position. According to the motion state recognition device, the motion state of the machine body can be accurately recognized through the activity recognition assembly, a magnetic disk and a magnetic disk circuit board do not need to be arranged, and the manufacturing cost of the motion state recognition device is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motion state recognition of equipment, in particular to a motion state recognition device and floor cleaning equipment. Background Art

[0002] At present, the devices that can move forward and backward on the market generally use the disk installed on the drive wheel and the relatively fixed disk circuit board to judge the forward and reverse rotation of the drive wheel, so as to identify the forward and backward movement of the device. For example, the Chinese patent with the authorization announcement number CN210478940U discloses a pedal-controlled drive mechanism for an amusement vehicle, including a machine main frame, a body installed on the machine main frame, a drive wheel installed at the bottom of the machine main frame, and a speed controller having a disk coaxially installed on a first rotating shaft, and multiple permanent magnets are arranged on the circumference of the disk at equal intervals. It can be seen that the pedal-controlled drive mechanism of the amusement vehicle detects the speed and direction of the magnetic field change of the disk through the speed controller. This method is not only costly, but also has complex control logic and is prone to misjudgment, resulting in failure of the device. Utility Model Content

[0003] In view of the above-mentioned technical problems existing in the prior art, the utility model provides a motion state recognition device and a floor cleaning device. The above-mentioned motion state recognition device can realize accurate recognition of the motion state of the machine body through an activity recognition component, without the need to set up a disk and a disk circuit board, thereby effectively reducing the manufacturing cost of the motion state recognition device.

[0004] The present invention provides a motion state recognition device, comprising:

[0005] A body having at least a first movement direction and a second movement direction opposite to the first movement direction;

[0006] an activity identification component, which is rotatably connected to the body, and includes an action member, when the body moves in the first movement direction, the action member is forced to move to a first position, and when the body moves in the second movement direction, the action member is forced to move to a second position;

[0007] The electric control component is arranged on the body, the actuating member in the first position is arranged closer to the electric control component than the actuating member in the second position, and the electric control component is used to generate a first identification signal when the actuating member is in the first position, and to generate a second identification signal when the actuating member is in the second position. The above-mentioned motion state recognition device can realize accurate recognition of the motion state of the body through the activity recognition component, without the need to set up a disk and a disk circuit board, which effectively reduces the manufacturing cost of the motion state recognition device.

[0008] In some embodiments, the activity identification component further includes a movable upper bracket, the movable upper bracket is rotatably connected to the body, and the movable upper bracket is connected to the actuator, and the actuator is used to receive force to drive the movable upper bracket closer to or away from the electronic control component. In this way, the actuator and the body can be stably and movably connected through the movable upper bracket.

[0009] In some embodiments, the movable upper bracket is provided with a first induction member, the electric control assembly includes a second induction member and a control board electrically connected to the second induction member, and the control board is used to obtain the first identification signal generated by the second induction member when the first induction member is close to the second induction member, and to obtain the second identification signal generated by the second induction member when the first induction member is away from the second induction member. In this way, the first identification signal or the second identification signal can be generated by the positional relationship between the first induction member and the second induction member to complete the identification of the movement direction of the body.

[0010] In some embodiments, the activity identification component further comprises a movable lower bracket, the movable lower bracket is movably arranged on the movable upper bracket, and the actuating member is rotatably connected to the movable lower bracket, so that the actuating member can approach or move away from the movable upper bracket. In this way, the actuating member can be stably mounted on the machine body through the movable upper bracket and the movable lower bracket.

[0011] In some embodiments, the activity identification component further comprises an elastic member, one end of which acts on the movable lower bracket, and the other end of which acts on the movable upper bracket, so as to apply a force to the movable lower bracket and the actuating member to move away from the movable upper bracket. In this way, the actuating member can be kept moving in a direction away from the movable upper bracket by the elastic member, so as to ensure that the actuating member can stably move between the first position and the second position under the force.

[0012] In some embodiments, the body moves on a first plane, and the action member is used to withstand the friction between the first plane and the action member when the body moves, so as to move between the first position and the second position. In this way, the friction between the action member and the first plane can enable the action member to stably move between the first position and the second position.

[0013] In some embodiments, the first induction element is configured as a magnetic element, and the second induction element is used to sense the magnetic field generated by the magnetic element to generate the first identification signal. The first identification signal can be stably generated by the magnetic field between the first induction element and the second induction element.

[0014] The embodiment of the utility model also provides a floor cleaning device, including the above-mentioned motion state recognition device. The above-mentioned motion state recognition device can accurately recognize the motion state of the machine body through the activity recognition component, without the need to set up a disk and a disk circuit board, effectively reducing the manufacturing cost of the motion state recognition device.

[0015] In some embodiments, the floor cleaning device further comprises a driving member, a roller brush and a movable scraper disposed on one side of the roller brush, the driving member being electrically connected to the electric control component, and the driving member being used to receive a first identification signal or a second identification signal sent by the electric control component, and to control the movable scraper to be raised or lowered. In this way, the movement of the movable scraper can be precisely controlled by the first identification signal and the second identification signal generated by the electric control component, so that the identification of the movement state can be realized without setting up a disk and a disk circuit board.

[0016] In some embodiments, the roller brush includes a first brush body and a second brush body, the movable scraper includes a first scraper and a second scraper, the first scraper is arranged on a side of the first brush body away from the second brush body, and the second scraper is arranged on a side of the second brush body away from the first brush body, and the driving member is used to control the first scraper to be lifted and the second scraper to be lowered when the first identification signal is received, and is used to control the first scraper to be lowered and the second scraper to be lifted when the second identification signal is received. In this way, by lifting one of the first scraper and the second scraper and lowering the other, the stains remaining on the ground can be effectively cleaned, thereby improving the cleaning efficiency.

[0017] Compared with the prior art, the beneficial effects of the embodiments of the utility model are as follows: the utility model uses an activity identification component rotatably connected to the body, and the active part of the activity identification component is in the first position as the body moves in the first movement direction, and the active part is in the second position as the body moves in the second direction, so that the active part switches between the first position and the second position as the movement direction changes, and the electronic control component can obtain different identification information according to the first position and the second position of the active part, thereby realizing accurate identification of the movement state of the body, without the need to set up a disk and a disk circuit board, effectively reducing the manufacturing cost of the movement state identification device, and the movement mode of the active part of the activity identification component is relatively stable, and the movement state can be accurately identified, avoiding the problem of complex control logic and easy misjudgment of the disk and the disk circuit board in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0019] Figure 1 This is a structural schematic diagram of a floor cleaning device using the motion state recognition device of an embodiment of the utility model, in which the machine body shown in the figure moves in a first motion direction;

[0020] Figure 2 This is a structural schematic diagram of a floor cleaning device using the motion state recognition device of an embodiment of the utility model, in which the machine body shown in the figure moves in the second motion direction;

[0021] Figure 3 It is a partial structural exploded diagram of a floor cleaning device using the motion state recognition device of the embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the activity recognition component of the motion state recognition device according to an embodiment of the utility model;

[0023] Figure 5 It is an exploded view of the activity recognition component of the motion state recognition device according to an embodiment of the utility model.

[0024] The components indicated by the reference numerals in the figures are:

[0025] 1. Machine body; 2. Activity identification component; 21. Actuating member; 22. Movable upper bracket; 23. Movable lower bracket; 24. Elastic member; 3. Electronic control component; 4. Connecting rod; 5. First plane; 6. Driving member; 71. First brush body; 72. Second brush body; 81. First scraper strip; 82. Second scraper strip. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] The present utility model embodiment provides a motion state recognition device. Figures 1 to 3As shown, the motion state recognition device includes a body 1, an activity recognition component 2 and an electric control component 3. The body 1 has at least a first motion direction and a second motion direction opposite to the first motion direction. The activity recognition component 2 is rotatably connected to the body 1, and the activity recognition component 2 includes an action member 21. When the body 1 moves in the first motion direction, the action member 21 is forced to move to the first position, and when the body 1 moves in the second motion direction, the action member 21 is forced to move to the second position. The electric control component 3 is arranged on the body 1, and the action member 21 in the first position is arranged close to the electric control component 3 relative to the action member 21 in the second position. The electric control component 3 is used to generate a first recognition signal when the action member 21 is in the first position, and to generate a second recognition signal when the action member 21 is in the second position.

[0028] Optionally, the activity identification component 2 may include an identification module for identifying the position of the action member 21 , and may also include structures capable of mutual induction, such as the second induction member described below, respectively arranged on the action member 21 and the electronic control component 3 , so as to realize the identification of the position of the action member 21 .

[0029] like Figure 1 and Figure 2 As shown, Figure 1 The machine body 1 shown in FIG. moves in the first movement direction, and the action member 21 is at the first position; Figure 2 The body 1 shown in FIG. moves in the second direction, and the action member 21 is at the second position. In this way, the position of the action member 21 can be changed with the switching of the movement direction of the body 1, so as to realize the recognition of the movement state of the body 1 by recognizing the position of the action member 21.

[0030] The identification of the above-mentioned motion state can be understood as at least the identification of the motion direction. The motion direction at least includes a first motion direction and a second motion direction.

[0031] The external force exerted on the above-mentioned action member 21 can be understood as being generated by the movement of the body 1. For example, the action member 21 is placed on the ground. During the movement of the body 1, friction will be generated between the action member 21 and the ground. The friction is the force that can be applied to the action member 21 to switch it between the first position and the second position.

[0032] The above-mentioned motion state recognition device can be applied to a device, which can realize the function to be completed by the device through the first recognition signal and the second recognition signal generated by the electronic control component 3, that is, it is necessary to realize the function of linkage control of other components of the device based on the movement direction of the body 1.

[0033] The utility model uses an activity identification component 2 that is rotatably connected to the body 1. The active member 21 of the activity identification component 2 is in the first position as the body 1 moves in the first movement direction, and the active member 21 is in the second position as the body 1 moves in the second direction, so that the active member 21 switches between the first position and the second position as the movement direction changes, and the electric control component 3 can obtain different identification information according to the first position and the second position of the active member 21, thereby accurately identifying the movement state of the body 1, without setting a disk and a disk circuit board, effectively reducing the manufacturing cost of the movement state identification device, and the movement mode of the active member 21 of the activity identification component 2 is relatively stable, and the movement state can be accurately identified, avoiding the problem of complex control logic and easy misjudgment of the disk and the disk circuit board in the prior art.

[0034] In some embodiments, Figures 1 to 5 As shown, the activity identification component 2 further includes a movable upper bracket 22, which is rotatably connected to the body 1, and the movable upper bracket 22 is connected to the action member 21, and the action member 21 is used to receive force to drive the movable upper bracket 22 to approach or move away from the electric control component 3. In this way, the action member 21 and the body 1 can be stably and movably connected through the movable upper bracket 22.

[0035] Optionally, the movable upper bracket 22 may be movably connected to the body 1 via a rotating shaft, so that the movable upper bracket 22 can swing around the rotating shaft relative to the body 1 between a first position and a second position.

[0036] In some embodiments, a first sensing element (not shown in the figure) is provided on the movable upper bracket 22, and the electric control component 3 includes a second sensing element and a control board (not shown in the figure) electrically connected to the second sensing element, and the control board is used to obtain a first identification signal generated by the second sensing element when the first sensing element is close to the second sensing element, and to obtain a second identification signal generated by the second sensing element when the first sensing element is far away from the second sensing element.

[0037] In this way, the first identification signal or the second identification signal can be generated according to the positional relationship between the first sensing element and the second sensing element, so as to complete the identification of the movement direction of the machine body 1 .

[0038] Optionally, the movable upper bracket 22 may have a protruding arm structure, and the first sensing element may be disposed on the arm structure to be close to or away from the second sensing element.

[0039] Optionally, the second sensing element may be one or more of the following: a micro switch, a photoelectric switch, and a Hall element. The first sensing element is a structural element that matches the second sensing element, so that when the two are close to or away from each other, the second sensing element can generate different recognition signals.

[0040] In some embodiments, the first sensing element is configured as a magnetic element, and the second sensing element is used to sense the magnetic field generated by the magnetic element to generate a first identification signal. The first identification signal can be stably generated by the magnetic field between the first sensing element and the second sensing element. The second sensing element can be specifically a Hall element.

[0041] In some embodiments, Figures 1 to 5 As shown, the activity identification component 2 also includes a movable lower bracket 23, which is movably arranged on the movable upper bracket 22, and the action member 21 is rotatably connected to the movable lower bracket 23, so that the action member 21 can approach or move away from the movable upper bracket 22.

[0042] In this way, the active member 21 can be stably mounted on the machine body 1 through the movable upper bracket 22 and the movable lower bracket 23 .

[0043] Optionally, a slide groove may be provided on the movable upper bracket 22 , and the movable lower bracket 23 may be installed in the slide groove. The movable lower bracket 23 may perform linear motion in the slide groove to perform up and down motion relative to the movable upper bracket 22 .

[0044] Optionally, the action member 21 may be rotatably connected to the movable lower bracket 23 via a rotating shaft, which is not specifically limited in the present application.

[0045] In some embodiments, Figure 4 and Figure 5 As shown, the activity identification component 2 further includes an elastic member 24, one end of which acts on the movable lower bracket 23, and the other end of which acts on the movable upper bracket 22, so as to apply a force to the movable lower bracket 23 and the action member 21 to move away from the movable upper bracket 22. In this way, the action member 21 can always be kept moving in a direction away from the movable upper bracket 22 by the elastic member 24, so as to ensure that the action member 21 can be stably subjected to force and move between the first position and the second position.

[0046] Optionally, the elastic member 24 can be specifically constructed as a compression spring, which can apply a stable force to the movable lower bracket 23 and the action member 21, so that when the action member 21 abuts against the ground, the action member 21 can maintain a state of abutting against the ground, thereby achieving a stable friction force on the action member 21, so that the action member 21 can maintain a state of stable switching between the first position and the second position.

[0047] In some embodiments, Figure 1 and Figure 2 As shown, the machine body 1 moves on the first plane 5, and the action member 21 is used to withstand the friction between the first plane 5 and the action member 21 when the machine body 1 moves, so as to move between the first position and the second position.

[0048] In this way, the friction force between the acting member 21 and the first plane 5 can enable the acting member 21 to stably move between the first position and the second position.

[0049] It can be understood that the floor to be cleaned by the floor cleaning device using the above-mentioned motion state recognition device when it is working is the above-mentioned first plane 5 .

[0050] The embodiment of the utility model also provides a floor cleaning device. The floor cleaning device includes a motion state recognition device as described above. The floor cleaning device using the above motion state recognition device uses an activity recognition component 2 that is rotatably connected to the body 1, and the action member 21 of the activity recognition component 2 is in the first position as the body 1 moves in the first motion direction, and the action member 21 is in the second position as the body 1 moves in the second direction, so that the action member 21 switches between the first position and the second position as the motion direction changes, and the electric control component 3 can obtain different identification information according to the first position and the second position of the action member 21, thereby realizing accurate recognition of the motion state of the body 1, without the need to set up a disk and a disk circuit board, effectively reducing the manufacturing cost of the motion state recognition device, and the movement mode of the action member 21 of the activity recognition component 2 is relatively stable, and the motion state can be accurately recognized, avoiding the problem of complex control logic and easy misjudgment of the disk and the disk circuit board in the prior art.

[0051] In some embodiments, Figures 1 to 3 As shown, the floor cleaning device also includes a driving member 6, a roller brush and a movable scraper provided on one side of the roller brush. The driving member 6 is electrically connected to the electric control component 3, and the driving member 6 is used to receive the first identification signal or the second identification signal sent by the electric control component 3, and control the movable scraper to be raised or lowered. In this way, the movement of the movable scraper can be accurately controlled by the first identification signal and the second identification signal generated by the electric control component 3, so that the identification of the movement state can be realized without setting up a disk and a disk circuit board.

[0052] Optionally, the roller brush is rotatably arranged on the machine body 1 to clean the ground with high-speed rotation. The movable scraper bar can be used to be lowered to clean the stains left on the ground by the roller brush, and can also be used to be raised to avoid affecting the roller brush cleaning the ground, so as to achieve a better effect of cleaning the ground.

[0053] After receiving the first identification signal or the second identification signal sent by the electronic control component 3, the driving member 6 can be raised or lowered by a certain distance with the movable scraper strip by forward or reverse rotation at a certain angle.

[0054] Optionally, the movable scraper strip may move in an arc-shaped cavity formed in the body 1 to be lifted or lowered in the arc-shaped cavity.

[0055] In some embodiments, Figures 1 to 3As shown, the roller brush includes a first brush body 71 and a second brush body 72, and the movable scraper includes a first scraper 81 and a second scraper 82. The first scraper 81 is arranged on the side of the first brush body 71 away from the second brush body 72, and the second scraper 82 is arranged on the side of the second brush body 72 away from the first brush body 71. The driving member 6 is used to control the first scraper 81 to lift up and the second scraper 82 to descend when a first identification signal is received, and is used to control the first scraper 81 to descend and the second scraper 82 to lift up when a second identification signal is received.

[0056] In this way, by raising one of the first scraper bar 81 and the second scraper bar 82 and lowering the other, the stains remaining on the ground can be effectively cleaned, thereby improving the cleaning efficiency.

[0057] Optionally, a soft rubber scraper strip may be provided at one end of the first scraper strip 81 and the second scraper strip 82 facing the ground. When the first scraper strip 81 or the second scraper strip 82 descends, the soft rubber scraper strip will contact the ground, and the stains left on the ground by the roller brush can be scraped off by the soft rubber scraper strip.

[0058] Optionally, the first scraper bar 81 and the second scraper bar 82 may be connected via the connecting rod 4, and the driving member 6 may drive the first scraper bar 81 to be raised and the second scraper bar 82 to be lowered, or drive the first scraper bar 81 to be lowered and the second scraper bar 82 to be raised via the connecting rod 4.

[0059] The following is a detailed introduction to the working status of the floor cleaning equipment: Figure 1 As shown, when the machine body 1 performs cleaning movement in the first movement direction, the action member 21 arranged on the machine body 1 swings a certain angle in the second movement direction opposite to the first movement direction under the action of the friction force of the ground, that is, swings to the first position, at which time the first induction member on the movable upper bracket 22 is close to the second induction member of the electric control component 3, and the control board of the electric control component 3 can obtain the first identification signal generated by the second induction member. The control board sends the first identification signal to the driving member 6, and the driving member 6 can rotate forward a certain angle based on the first identification signal to realize the control of the first scraper 81 to lift and the second scraper 82 to descend, so that the second scraper 82 can fall so that the soft rubber scraper on it is kept closed with the ground, and the garbage in the first movement direction is cleaned up by the first brush body 71 and the second brush body 72, and at the same time, the second scraper 82 can scrape off the stains remaining on the ground from the roller brush.

[0060] Furthermore, if Figure 2As shown, when the machine body 1 performs cleaning movement in the second movement direction, the action member 21 arranged on the machine body 1 swings a certain angle in the first movement direction opposite to the second movement direction under the action of the friction force of the ground, that is, swings to the second position. At this time, the first induction member on the movable upper bracket 22 is away from the second induction member of the electric control component 3, and the control board of the electric control component 3 can obtain the second identification signal generated by the second induction member. The control board sends the second identification signal to the driving member 6, and the driving member 6 can reverse a certain angle based on the second identification signal to realize the control of the first scraper 81 to descend and the second scraper 82 to lift. In this way, the first scraper 81 can fall so that the soft rubber scraper on it is kept closed with the ground, and the garbage in the second movement direction is cleaned up by the first brush body 71 and the second brush body 72. At the same time, the first scraper 81 can scrape off the stains remaining on the ground from the roller brush.

[0061] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A motion state recognition device, characterized in that: include: A machine body (1) having at least a first movement direction and a second movement direction opposite to the first movement direction; An activity identification component (2) is rotatably connected to the body (1), and the activity identification component (2) comprises an action member (21). When the body (1) moves in the first movement direction, the action member (21) is forced to move to a first position, and when the body (1) moves in the second movement direction, the action member (21) is forced to move to a second position; An electric control component (3) is arranged on the machine body (1), the actuating member (21) in the first position is arranged close to the electric control component (3) relative to the actuating member (21) in the second position, and the electric control component (3) is used to generate a first identification signal when the actuating member (21) is in the first position, and to generate a second identification signal when the actuating member (21) is in the second position.

2. The motion state recognition device according to claim 1, characterized in that: The activity identification component (2) further comprises a movable upper bracket (22), wherein the movable upper bracket (22) is rotatably connected to the body (1), and the movable upper bracket (22) is connected to the actuating member (21), and the actuating member (21) is used to receive force to drive the movable upper bracket (22) to move closer to or away from the electric control component (3).

3. The motion state recognition device according to claim 2, characterized in that: The movable upper bracket (22) is provided with a first induction element, and the electric control component (3) includes a second induction element and a control board electrically connected to the second induction element, wherein the control board is used to obtain the first identification signal generated by the second induction element when the first induction element is close to the second induction element, and to obtain the second identification signal generated by the second induction element when the first induction element is away from the second induction element.

4. The motion state recognition device according to claim 2, characterized in that: The activity identification component (2) further comprises a movable lower bracket (23), wherein the movable lower bracket (23) is movably arranged on the movable upper bracket (22), and the actuating member (21) is rotatably connected to the movable lower bracket (23), so that the actuating member (21) can approach or move away from the movable upper bracket (22).

5. The motion state recognition device according to claim 4, characterized in that: The activity identification component (2) further comprises an elastic member (24), one end of the elastic member (24) acting on the movable lower bracket (23), and the other end of the elastic member (24) acting on the movable upper bracket (22), so as to apply a force to the movable lower bracket (23) and the action member (21) to move them away from the movable upper bracket (22).

6. The motion state recognition device according to claim 1, characterized in that: The machine body (1) moves on a first plane (5), and the action member (21) is used to withstand the friction force between the first plane (5) and the action member (21) when the machine body (1) moves, so as to move between the first position and the second position.

7. The motion state recognition device according to claim 3, characterized in that: The first induction element is configured as a magnetic element, and the second induction element is used to sense the magnetic field generated by the magnetic element to generate the first identification signal.

8. A floor cleaning device, characterized in that: It comprises the motion state recognition device as described in any one of claims 1 to 7.

9. The floor cleaning device according to claim 8, characterized in that: The floor cleaning device further comprises a driving member (6), a roller brush and a movable scraper bar arranged on one side of the roller brush, wherein the driving member (6) is electrically connected to the electric control component (3), and the driving member (6) is used to receive a first identification signal or a second identification signal sent by the electric control component (3), and to control the movable scraper bar to be raised or lowered.

10. The floor cleaning device according to claim 9, characterized in that: The roller brush comprises a first brush body (71) and a second brush body (72); the movable scraper comprises a first scraper (81) and a second scraper (82); the first scraper (81) is arranged on a side of the first brush body (71) away from the second brush body (72); the second scraper (82) is arranged on a side of the second brush body (72) away from the first brush body (71); the driving member (6) is used to control the first scraper (81) to be lifted and the second scraper (82) to be lowered when the first identification signal is received, and is used to control the first scraper (81) to be lowered and the second scraper (82) to be lifted when the second identification signal is received.

Images