High-altitude operation rotary table rotation detection device and method

Abstract

The device comprises a supporting plate fixedly connected with a rotation support, a rotation detection plate is fixed to the upper portion of the supporting plate, and the rotation detection plate is semicircular and is matched with the rotation radius of a rotation body of the rotary table; when the high-altitude vehicle slewing mechanism conducts slewing motion, the slewing detection plate does not move, a first proximity switch and a second proximity switch are arranged on a rotary table of the slewing mechanism, and when the slewing mechanism conducts slewing motion, the first proximity switch and the second proximity switch conduct detection motion above the slewing detection plate. Two proximity switches are used for detecting a left area and a right area, unilateral area protection operation is carried out in cooperation with the extending states of the left horizontal supporting leg and the right horizontal supporting leg, dangerous direction limiting operation is carried out after rotation enters a dangerous area, however, rotation motion in the safe direction can be carried out, and whole vehicle rotation operation can be ensured.

Description

Technical Field

[0001] The present invention relates to the field of aerial work turntable rotation detection devices and methods, and in particular to aerial work turntable rotation detection devices and methods. Background Art

[0002] Single-sided area operations of vehicle-mounted aerial work vehicles often occur during vehicle use. The currently commonly used technical means is to use an encoder to calculate the rotation angle of the turntable, perform single-sided area operations, and determine the rotation area. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a high-altitude work turntable rotation detection device and method, which uses two proximity switches to detect the left and right areas, and cooperates with the extended state of the left and right horizontal legs to perform single-side area protection operations. After rotating into the dangerous area, operations in the dangerous direction are restricted, but the device can rotate in a safe direction to ensure that the entire vehicle can rotate.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a rotation detection device and method for a high-altitude work turntable, the device comprises a support plate fixedly connected to a rotation support, a rotation detection plate is fixed above the support plate, the rotation detection plate is semicircular and is adapted to the rotation radius of the turntable rotation body, the rotation detection plate does not move when the aerial vehicle rotation mechanism performs a rotation motion, a first proximity switch and a second proximity switch are arranged on the turntable of the rotation mechanism, the first proximity switch and the second proximity switch are communicatively connected with a vehicle controller, and when the aerial vehicle rotation mechanism performs a rotation motion, the first proximity switch and the second proximity switch perform a detection motion above the rotation detection plate;

[0006] When the upper body rotates, that is, the rotation is operated at the initial rotation position zero degree position, the first proximity switch and the second proximity switch are respectively arranged at the left end of the rotation detection plate and the first proximity switch can detect the rotation detection plate, and the second proximity switch is suspended; the method is based on the four extension modes of the vehicle horizontal support legs, specifically:

[0007] When both sides of the vehicle's horizontal outriggers are extended to their full length, the aerial platform's upper body can rotate freely without restriction.

[0008] When the horizontal outriggers on both sides of the vehicle are not extended, the left and right rotation of the aerial platform is restricted and the vehicle is not allowed to rotate;

[0009] When the right horizontal outrigger of the vehicle is fully extended and the left horizontal outrigger is not extended, the controller controls the safe direction of the upper body rotation according to the signal change state of the first proximity switch and the second proximity switch;

[0010] When the left horizontal outrigger of the vehicle is fully extended and the right horizontal outrigger is not extended, the controller controls the safe direction of the upper body rotation according to the signal change state of the first proximity switch and the second proximity switch.

[0011] Preferably, when the right horizontal outrigger of the vehicle is extended to the right position and the left horizontal outrigger is not extended, the specific control method is:

[0012] In the initial state of 0-degree rotation, the controller receives the first proximity switch signal but does not receive the detection signal of the second proximity switch. At this time, the controller determines that the upper body is in the initial state of 0-degree rotation. Since the right horizontal outrigger is fully extended, the controller outputs a rotation control signal, allowing only right rotation movement in the safe direction, and prohibiting left movement;

[0013] When the upper body rotates from the initial state of 0 degrees to the right area, the first proximity switch and the second proximity switch simultaneously detect the rotation detection plate, and the controller simultaneously receives the first proximity switch and the second proximity switch signals. At this time, the controller determines that the upper body has entered the right area, and the left and right rotation operations can be carried out normally;

[0014] When the upper body continues to rotate to the right in the right area, when it rotates to 180 degrees, the first proximity switch disengages from the rotation detection plate, and the second proximity switch is still in contact with the rotation detection plate. The controller receives the signal of the second proximity switch but does not receive the signal of the first proximity switch, and determines that the rotation in the right area has been rotated into place, restricts the right rotation, and only allows left rotation.

[0015] Preferably, when the left horizontal outrigger of the vehicle is extended to the right position and the right horizontal outrigger is not extended, the specific control method is:

[0016] In the initial state of 0-degree rotation, the controller receives the first proximity switch signal but does not receive the detection signal of the second proximity switch. At this time, the controller determines that the upper body is in the initial state of 0-degree rotation. Since the left horizontal outrigger is fully extended, the controller outputs a rotation control signal, allowing only left rotation movement in the safe direction and prohibiting right movement;

[0017] When the upper body rotates from the initial state of 0 degrees to the left area, the first proximity switch and the second proximity switch are separated from the rotation detection plate at the same time, and the controller does not receive the first proximity switch and the second proximity switch signals at the same time. At this time, the controller determines that the upper body has entered the left area, and the left and right rotation operations can be carried out normally;

[0018] When the upper body continues to rotate to the left in the left area, when it rotates to 180 degrees, the second proximity switch detects the rotation detection plate, and the first proximity switch is still out of the rotation detection plate. The controller receives the signal of the second proximity switch but does not receive the signal of the first proximity switch, and determines that the left area rotation has been rotated into place, restricts the left rotation, and only allows right rotation.

[0019] Preferably, the first proximity switch and the second proximity switch are both PNP normally open proximity switches, and when the first proximity switch and the second proximity switch are above the rotation detection plate, a high level signal is generated and enters the controller.

[0020] Preferably, the structure of the support plate is also semicircular, and the support plate is fixedly connected to the rotation detection plate above it through a plurality of connecting columns.

[0021] The beneficial effects of the present invention are: using two proximity switches to detect the left and right areas, cooperating with the extension of the left and right horizontal legs to perform unilateral area protection operations, and after rotating into the dangerous area, limiting the dangerous direction operation, but can rotate in the safe direction to ensure that the whole vehicle can rotate. Compared with conventional encoder rotation detection, the structure is simple, easy to install, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a rotation detection device for a high-altitude work turntable provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the vehicle with both horizontal outriggers extended to their full length;

[0025] Figure 3 It is a schematic diagram when both horizontal outriggers on the vehicle are not extended;

[0026] Figure 4 This is a schematic diagram of the vehicle with the right horizontal outrigger fully extended and the left horizontal outrigger not extended;

[0027] Figure 5 It is a schematic diagram of the positions of the first proximity switch and the second proximity switch in the initial state of rotation 0 degrees;

[0028] Figure 6 This is a schematic diagram of the positions of the two proximity switches when the upper body rotates from the initial state of 0 degrees to the right area;

[0029] Figure 7 This is a schematic diagram of the proximity switch position when the upper body rotates to 180 degrees in the right area;

[0030] Figure 8This is a schematic diagram of the vehicle with the left horizontal outrigger fully extended and the right horizontal outrigger not extended;

[0031] Fig. 9 It is a schematic diagram of the two proximity switches being separated from the detection plate at the same time after the upper body rotates from the initial state of 0 degrees to the left area;

[0032] Fig.10 The schematic diagram of the positions of the two proximity switches when the upper body rotates to 180 degrees in the left area.

[0033] Fig.11 The present invention is a flow chart of a detection method of a high-altitude work turntable rotation detection device.

[0034] Description of reference numerals:

[0035] 1. Support plate; 2. Rotation detection plate; 3. First detection switch; 4. Second detection switch. DETAILED DESCRIPTION

[0036] 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.

[0037] like Figure 1 As shown, a rotation detection device and method for a high-altitude work turntable, the device includes a support plate 1 fixedly connected to a rotation support, a rotation detection plate 2 is fixed above the support plate 1, the rotation detection plate 2 is semicircular and adapted to the rotation radius of the turntable rotation body, the rotation detection plate 2 does not move when the aerial vehicle rotation mechanism performs a rotation movement, a first proximity switch 3 and a second proximity switch 4 (referred to as the first switch and the second switch) are provided on the turntable of the rotation mechanism, the first proximity switch 3 and the second proximity switch 4 are communicatively connected with the vehicle controller, and the first proximity switch 3 and the second proximity switch 4 perform detection movement above the rotation detection plate 2 when the aerial vehicle rotation mechanism performs a rotation movement;

[0038] When the upper body rotates, that is, the rotation is operated at the initial rotation position zero degree position, the first proximity switch 3 and the second proximity switch 4 are respectively arranged at the left end of the rotation detection plate 2 and the first proximity switch 3 can detect the rotation detection plate 2, and the second proximity switch 4 is suspended; the method is based on the four extension modes of the vehicle horizontal legs, specifically:

[0039] like Figure 2 As shown, when the horizontal outriggers on both sides of the vehicle are extended to the right position, the rotation of the aerial platform is not restricted and can be rotated at will.

[0040] like Figure 3 As shown, when the horizontal outriggers on both sides of the vehicle are not extended, the left and right rotation of the aerial platform is restricted and the vehicle is not allowed to rotate.

[0041] like Figure 4 As shown, when the right horizontal leg of the vehicle is extended to the right position and the left horizontal leg is not extended, the controller needs to control the safe direction of the upper body rotation according to the signal change state of the first proximity switch 3 and the second proximity switch 4. The specific control method is as follows:

[0042] 1) Rotate to 0 degrees in the initial state, such as Figure 5 As shown, the controller receives the signal from the first proximity switch 3, but does not receive the detection signal from the second proximity switch 4. At this time, the controller determines that the upper body is in the initial state of 0-degree rotation. Since the right horizontal outrigger is fully extended, the controller outputs a rotation control signal, allowing only rightward rotation movement in the safe direction, and prohibiting leftward movement.

[0043] 2) When the upper body rotates from the initial state of 0 degrees to the right area, Figure 6 As shown, the first proximity switch 3 and the second proximity switch 4 detect the rotation detection plate 2 at the same time, and the controller receives the signals of the first proximity switch 3 and the second proximity switch 4 at the same time. At this time, the controller determines that the upper body enters the right area, and the left and right rotation operations can be carried out normally;

[0044] 3) When the upper body rotates in the right area, it continues to rotate to the right. Figure 7 As shown, when rotating 180 degrees, the first proximity switch 3 disengages from the rotation detection plate 2, and the second proximity switch 4 is still in contact with the rotation detection plate 2. The controller receives the signal from the second proximity switch 4 but does not receive the signal from the first proximity switch 3. It is determined that the right area rotation has been rotated into place, and the right rotation is restricted, and only left rotation is allowed.

[0045] like Figure 8 As shown, when the left horizontal leg of the vehicle is extended to the right and the right horizontal leg is not extended, the controller needs to control the safe direction of the upper body rotation according to the signal change state of the first proximity switch 3 and the second proximity switch 4. The specific control method is as follows:

[0046] 1) Rotate to 0 degrees in the initial state, such as Figure 5 As shown, the controller receives the signal from the first proximity switch 3, but does not receive the detection signal from the second proximity switch 4. At this time, the controller determines that the upper body is in the initial state of 0-degree rotation. Since the left horizontal outrigger is fully extended, the controller outputs a rotation control signal, allowing only left rotation movement in the safe direction, and prohibiting right movement.

[0047] 2) When the upper body rotates from the initial state of 0 degrees to the left area, Fig. 9As shown, the first proximity switch 3 and the second proximity switch 4 are simultaneously disengaged from the rotation detection plate 2, and the controller does not receive the first proximity switch 3 and the second proximity switch 4 signals at the same time. At this time, the controller determines that the upper body has entered the left area, and the left and right rotation operations can be carried out normally;

[0048] 3) When the upper body rotates in the left area, it continues to rotate to the left. Fig.10 As shown, when rotating to 180 degrees, the second proximity switch 4 detects the rotation detection plate 2, and the first proximity switch 3 is still detached from the rotation detection plate 2. The controller receives the signal from the second proximity switch 4 but does not receive the signal from the first proximity switch 3. It is determined that the left area rotation has been rotated into place, and the left rotation is restricted, and only right rotation is allowed.

[0049] The present invention can achieve the limitation of the dangerous rotation direction after entering the dangerous area during unilateral operation through the above method, but can move in the safe direction to ensure that the rotation can be turned out of the dangerous area. The specific process logic diagram is as follows Fig.11 shown.

[0050] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A high-altitude work turntable rotation detection device and method, characterized in that: The device comprises a support plate (1) fixedly connected to a slewing support, a slewing detection plate (2) being fixed above the support plate (1), the slewing detection plate (2) being semicircular and adapted to the slewing radius of the slewing body of the turntable, the slewing detection plate (2) not moving when the aerial vehicle slewing mechanism performs a slewing motion, a first proximity switch (3) and a second proximity switch (4) being arranged on the turntable of the slewing mechanism, the first proximity switch (3) and the second proximity switch (4) being communicatively connected to a vehicle controller, and the first proximity switch (3) and the second proximity switch (4) performing a detection motion above the slewing detection plate (2) when the aerial vehicle slewing mechanism performs a slewing motion; When the upper body rotates, i.e., rotates at the initial rotation position zero degree position, the first proximity switch (3) and the second proximity switch (4) are respectively arranged at the left end of the rotation detection plate (2) and the first proximity switch (3) can detect the rotation detection plate (2), and the second proximity switch (4) is suspended in the air; the method is based on four extension modes of the vehicle horizontal support legs, specifically: When both sides of the vehicle's horizontal outriggers are extended to their full length, the aerial platform's upper body can rotate freely without restriction. When the horizontal outriggers on both sides of the vehicle are not extended, the left and right rotation of the aerial platform is restricted and the vehicle is not allowed to rotate; When the right horizontal leg of the vehicle is extended to the right position and the left horizontal leg is not extended, the controller controls the safe direction of the upper body rotation according to the signal change state of the first proximity switch (3) and the second proximity switch (4); When the left side horizontal support leg of the vehicle is extended to the right side and the right side horizontal support leg is not extended, the controller controls the safe direction of the upper body rotation according to the signal change state of the first proximity switch (3) and the second proximity switch (4).

2. A high-altitude work turntable rotation detection device and method as claimed in claim 1, characterized in that: When the right horizontal outrigger of the vehicle is fully extended and the left horizontal outrigger is not extended, the specific control method is as follows: In the initial state of 0-degree rotation, the controller receives a signal from the first proximity switch (3) but does not receive a detection signal from the second proximity switch (4). At this time, the controller determines that the upper body is in the initial state of 0-degree rotation. Since the right horizontal outrigger is fully extended, the controller outputs a rotation control signal, allowing only rightward rotation movement in a safe direction and prohibiting leftward movement. When the upper body rotates from the initial state of 0 degrees to the right area, the first proximity switch (3) and the second proximity switch (4) simultaneously detect the rotation detection plate (2), and the controller simultaneously receives the signals of the first proximity switch (3) and the second proximity switch (4). At this time, the controller determines that the upper body has entered the right area, and the left and right rotation operations can be carried out normally; When the upper body rotates in the right area and continues to rotate to the right, when it rotates to 180 degrees, the first proximity switch (3) is separated from the rotation detection plate (2), and the second proximity switch (4) is still in contact with the rotation detection plate (2). The controller receives the signal of the second proximity switch (4) but does not receive the signal of the first proximity switch (3), and determines that the rotation of the right area has been completed, restricts the right rotation, and only allows the left rotation.

3. A high-altitude work turntable rotation detection device and method as claimed in claim 2, characterized in that: When the left horizontal outrigger of the vehicle is fully extended and the right horizontal outrigger is not extended, the specific control method is as follows: In the initial state of 0-degree rotation, the controller receives a signal from the first proximity switch (3) but does not receive a detection signal from the second proximity switch (4). At this time, the controller determines that the upper body is in the initial state of 0-degree rotation. Since the left horizontal outrigger is fully extended, the controller outputs a rotation control signal, allowing only left rotation movement in a safe direction and prohibiting right movement. When the upper body rotates from the initial state of 0 degrees to the left area, the first proximity switch (3) and the second proximity switch (4) are simultaneously separated from the rotation detection plate (2), and the controller does not receive the first proximity switch (3) and the second proximity switch (4) signals at the same time. At this time, the controller determines that the upper body has entered the left area, and the left and right rotation operations can be carried out normally; When the upper body rotates in the left area and continues to rotate to the left, when it rotates to 180 degrees, the second proximity switch (4) detects the rotation detection plate (2), and the first proximity switch (3) is still separated from the rotation detection plate (2). The controller receives the signal of the second proximity switch (4) but does not receive the signal of the first proximity switch (3), and determines that the rotation in the left area has been completed, restricts the left rotation, and only allows the right rotation.

4. A high-altitude work turntable rotation detection device and method as claimed in claim 3, characterized in that: The first proximity switch (3) and the second proximity switch (4) are both PNP normally open proximity switches, and when the first proximity switch (3) and the second proximity switch (4) are above the rotation detection plate (2), a high level signal is generated and enters the controller.

5. A high-altitude work turntable rotation detection device and method as claimed in claim 1, characterized in that: The structure of the support plate (1) is also semicircular, and the support plate (1) is fixedly connected to the rotation detection plate (2) above it by welding via a plurality of connection columns.

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