CN111847327A - Aerial work platform and active defense method - Google Patents
Aerial work platform and active defense method Download PDFInfo
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- CN111847327A CN111847327A CN202010858500.4A CN202010858500A CN111847327A CN 111847327 A CN111847327 A CN 111847327A CN 202010858500 A CN202010858500 A CN 202010858500A CN 111847327 A CN111847327 A CN 111847327A
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- 238000000034 method Methods 0.000 title claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 80
- 239000010959 steel Substances 0.000 claims abstract description 80
- 230000009471 action Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000033001 locomotion Effects 0.000 claims abstract description 10
- 230000008859 change Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 8
- 208000027418 Wounds and injury Diseases 0.000 abstract description 7
- 208000014674 injury Diseases 0.000 abstract description 7
- 230000000007 visual effect Effects 0.000 description 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
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Abstract
The present disclosure relates to an aerial work platform, comprising: mounting a bracket; the first end of the steel wire rope is fixedly arranged on the mounting bracket, and the second end of the steel wire rope is detachably connected to the mounting bracket and used for detecting the body posture of an operator in the aerial work platform; the proximity switch is fixedly arranged on the mounting bracket and used for detecting whether the second end of the steel wire rope is positioned at the preset connecting position of the mounting bracket; the action output valves are used for controlling the starting and stopping of a plurality of maneuvering actions of the aerial work platform; and an ECU communicatively coupled to the proximity switch and the plurality of motion output valves and configured to: and responding to the detection result of the proximity switch, closing the plurality of action output valves when the second end of the steel wire rope is not at the preset connection position, and restarting the plurality of action output valves when the second end of the steel wire rope is reconnected to the mounting bracket. The safety control system can prevent continuous injury to the operators caused by continuous operation of the equipment of the aerial working platform when the operators are injured or lose safe driving positions.
Description
Technical Field
The disclosure relates to the field of engineering machinery, in particular to an aerial work platform and an active defense method.
Background
With the scientific and technological progress and the sound establishment of laws and regulations, the traditional aerial work equipment such as scaffolds cannot meet the requirements of current aerial work, and under the background, aerial work platforms are produced at the right moment. The aerial work platform is used as a substitute of traditional aerial work equipment such as a scaffold and has great advantages in safety, economy, convenience and the like.
In the related technology, mechanical protection in a structure extension form is mainly adopted for protecting the aerial work platform and operators in the aerial work platform, the protection on the operators and equipment is not complete enough, and continuous injury to the operators caused by continuous operation of the equipment of the aerial work platform when the operators are injured or lose a safe driving position is difficult to avoid.
The safety accident caused by misoperation of the operator occurs sometimes, and how to protect the operator from personal injury caused by misoperation and visual field problems is a main problem for active safety protection of the aerial work platform under the condition that the safety of the operator is difficult to be ensured by the existing protection measures.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide an aerial work platform and an active defense method, which can actively defend an operator of the aerial work platform, and prevent continuous injury to the operator caused by continuous operation of equipment of the aerial work platform when the operator is injured or loses a safe driving position.
In one aspect of the present disclosure, there is provided an aerial work platform comprising:
mounting a bracket;
the first end of the steel wire rope is fixedly arranged on the mounting bracket, and the second end of the steel wire rope is detachably connected to the mounting bracket and used for detecting the body posture of an operator in the aerial work platform;
the proximity switch is fixedly arranged on the mounting bracket and used for detecting whether the second end of the steel wire rope is located at a preset connecting position of the mounting bracket;
the action output valves are used for controlling the starting and stopping of a plurality of maneuvering actions of the aerial work platform; and
an ECU communicatively connected to the proximity switch and the plurality of motion output valves and configured to: and responding to the detection result of the proximity switch, closing the action output valves when the second end of the steel wire rope is not positioned at the preset connection position, and restarting the action output valves when the second end of the steel wire rope is reconnected to the mounting bracket.
In some embodiments, the aerial work platform further comprises:
an engine for driving a hydraulic pump for supplying oil to the plurality of operation output valves;
the ECU is communicatively connected to a control unit of the engine and is further configured to: and responding to the detection result of the proximity switch, controlling the engine to be flamed out when the second end of the steel wire rope is not positioned at the preset connection position, and restarting the engine when the second end of the steel wire rope is reconnected to the mounting bracket.
In some embodiments, the aerial work platform further comprises:
the buzzer is used for giving out sound and light alarm; and
the display is used for displaying the working state of the aerial work platform;
the ECU is communicatively coupled to the buzzer and the display, and is further configured to: responding to the detection result of the proximity switch, and when the second end of the steel wire rope is not positioned at the preset connection position, enabling the buzzer to give out sound and light alarm, and enabling the display to display that the active defense device is in a trigger state; and when the second end of the steel wire rope is connected to the mounting bracket again, the buzzer stops giving out sound and light alarm, and the display displays that the active defense device is not in a triggering state any more.
In some embodiments, the proximity switch is connected to a DI port of the ECU, the plurality of motion output valves are respectively connected to a plurality of DO/PWM ports of the ECU, the buzzer is connected to the DO port of the ECU, and the ECU sends alarm information to the display through a CAN bus.
In some embodiments, the aerial work platform further comprises:
the equipment operation platform is in communication connection with the ECU and is configured to output corresponding signals to the ECU according to instructions of an operator in the aerial work platform so as to control the opening and closing of the action output valves;
the ECU is further configured to: and responding to the detection result of the proximity switch, disconnecting the control of the equipment operating platform on the plurality of action output valves when the second end of the steel wire rope is not at the preset connection position, and reconnecting the control of the equipment operating platform on the plurality of action output valves when the second end of the steel wire rope is reconnected to the mounting bracket.
In another aspect of the present disclosure, an active defense method for an aerial work platform is provided, including:
the body posture of an operator in the aerial work platform is detected by a steel wire rope with a first end fixedly arranged on the mounting bracket and a second end detachably connected to the mounting bracket;
detecting whether the second end of the steel wire rope is located at a preset connecting position of the mounting bracket through a proximity switch;
when the second end of the steel wire rope is not positioned at the preset connecting position, closing a plurality of action output valves for controlling a plurality of maneuvering actions of the aerial work platform; and
and restarting the plurality of action output valves when the second end of the steel wire rope is reconnected to the mounting bracket.
In some embodiments, the active defense method further comprises:
when the second end of the steel wire rope is not positioned at the preset connecting position, controlling the engine to extinguish, enabling the buzzer to give out sound and light alarm, and enabling the display to display that the active defense device is in a trigger state; and
and when the second end of the steel wire rope is connected to the mounting bracket again, the engine is restarted, the buzzer stops emitting sound and light alarm, and the display displays that the active defense device is no longer in a trigger state.
In some embodiments, the active defense method further comprises:
connecting the proximity switch to a DI port of an ECU, connecting the plurality of action output valves to a plurality of DO/PWM ports of the ECU, respectively, connecting the buzzer to the DO port of the ECU, and connecting the display to a CAN bus of the ECU;
when the proximity switch detects that the second end of the steel wire rope is not located at the preset connection position of the mounting bracket, disconnecting the signal of the DI port to change the DI port of the ECU from a high level state to a low level state; and
and disconnecting the DO/PWM port connected to the plurality of operation output valves, the DO port connected to the buzzer, and the CAN bus connected to the display by the ECU.
In some embodiments, the active defense method further comprises:
when the proximity switch detects that the second end of the steel wire rope is located at a preset connecting position of the mounting bracket, a signal of the DI port is switched on, and the DI port of the ECU is changed from a low level state to a high level state; and
and turning on the DO/PWM port connected to the operation output valves, the DO port connected to the buzzer, and a CAN bus connected to the display by the ECU.
In some embodiments, the active defense method further comprises:
when the second end of the steel wire rope is not located at the preset connection position, the control of the equipment operating platform on the plurality of action output valves is disconnected; and
and when the second end of the steel wire rope is connected to the mounting bracket again, the equipment operating platform is reconnected to control the plurality of action output valves.
Therefore, according to the embodiment of the disclosure, whether the operator is in a safe operation position or not is detected in real time through the active defense device, and the high-altitude operation platform is controlled to be braked emergently when the operator is not in the safe operation position, so that the operator is prevented from being continuously injured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of an aerial work platform according to some embodiments of the present disclosure;
FIG. 2 is a schematic structural view of a mounting bracket in an aerial work platform according to some embodiments of the present disclosure;
FIG. 3 is a schematic illustration of a communications link for an aerial work platform according to some embodiments of the present disclosure;
FIG. 4 is a flow chart of a method of active defense of an aerial work platform according to some embodiments of the present disclosure;
fig. 5 is an electrical schematic diagram corresponding to an active defense method for an aerial work platform according to some embodiments of the disclosure.
In the figure: 1, mounting a bracket; 2, a steel wire rope; 3, a proximity switch; 4, an action output valve; 5, an ECU; 6, an engine; 7, a buzzer; and 8, a display.
It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
The applicant researches and discovers that:
the existing aerial work platform takes a straight crank arm as an example and mainly comprises a work platform, an arm support, a rotary table and a lower vehicle, wherein the rotary table and the lower vehicle can realize the walking of the aerial work platform in a work field or the transition between fields by utilizing self power, and the arm support and the work platform are used for conveying operators and using equipment to a specified height for operation.
The operation control of the aerial work platform is generally divided into platform control and turntable control. The platform control can operate the straight-crank arm type aerial work platform to walk, turn, change amplitude upwards, change amplitude downwards and the like through a handle and an operating button. And the rotary table control is used as an auxiliary operation mode, and the operation is performed through a rotary table operation panel, so that the arm support on the straight-crank arm type aerial work platform can be operated to act.
In the process of applying the aerial work platform, safety accidents caused by misoperation or visual field problems of operators occur every year, and how to practically protect the operators from personal injury caused by the misoperation or the visual field problems is a problem to be solved urgently by the current aerial work platform. Neither the national standard (GB/T25849) nor the European standard (EN280) of the aerial work platform can consider the complexity of the construction environment and the risks caused by human factors of operators.
In view of the above, as shown in fig. 1 to 5: in one aspect of the present disclosure, there is provided an aerial work platform comprising:
mounting a bracket 1;
the first end of the steel wire rope 2 is fixedly arranged on the mounting bracket 1, and the second end of the steel wire rope is detachably connected to the mounting bracket 1 and used for detecting the body posture of an operator in the aerial work platform;
the proximity switch 3 is fixedly arranged on the mounting bracket 1 and used for detecting whether the second end of the steel wire rope 2 is located at a preset connecting position of the mounting bracket 1;
the action output valves 4 are used for controlling the starting and stopping of a plurality of maneuvering actions of the aerial work platform; and
an ECU5 communicatively connected to the proximity switch 3 and the plurality of motion output valves 4 and configured to: and in response to the detection result of the proximity switch 3, when the second end of the steel wire rope 2 is not at the preset connection position, closing the plurality of action output valves 4, and when the second end of the steel wire rope 2 is reconnected to the mounting bracket 1, restarting the plurality of action output valves 4.
Based on the embodiment, the active defense device in the aerial work platform consists of the mounting bracket 1, the steel wire rope 2 and the proximity switch 3, wherein one end of the steel wire rope 2 is fixed on the right bracket, and the other end of the steel wire rope is sucked in the detection range of the proximity switch 3 of the left bracket through the magnet head. When the back of an operator of the aerial work platform is extruded in the process of operating equipment, the chest moves forwards to touch the steel wire rope 2, a detection signal output to the ECU5 control unit by the proximity switch 3 is disconnected, the ECU5 stops action output of all the action output valves 4 immediately, and the aerial work platform can work normally only when the operator restores the magnet attraction of the steel wire rope 2 after confirming that the state is safe. Therefore, further safety accidents caused by out-of-control vehicles due to extrusion injury caused by misoperation of operators and loss of the operation positions of the operators can be effectively prevented, and the significance of designing the safety protection device for the operators on the aerial work platform is great.
In order to prevent the action output valve 4 from being stuck and the action cannot be stopped, which causes an accident, in some embodiments, the aerial work platform further comprises:
an engine 6 for driving a hydraulic pump for supplying oil to the plurality of operation output valves 4;
the ECU5 is communicatively connected to a control unit of the engine 6, and is further configured to: and responding to the detection result of the proximity switch 3, controlling the engine 6 to be switched off when the second end of the steel wire rope 2 is not at the preset connection position, and restarting the engine 6 when the second end of the steel wire rope 2 is reconnected to the mounting bracket 1.
Further, in order to remind the operators on the aerial work platform, the drivers who get off and the personnel aerial work platform around in time that the dangerous condition has taken place, in some embodiments, the aerial work platform further includes:
the buzzer 7 is used for giving out sound and light alarm; and
the display 8 is used for displaying the working state of the aerial work platform;
the ECU5 is communicatively connected to the buzzer 7 and the display 8, and is further configured to: responding to the detection result of the proximity switch 3, when the second end of the steel wire rope 2 is not at the preset connection position, enabling the buzzer 7 to give out sound and light alarm, and enabling the display 8 to display that the active defense device is in a trigger state; when the second end of the steel wire rope 2 is connected to the mounting bracket 1 again, the buzzer 7 stops giving out sound and light alarm, and the display 8 displays that the active defense device is no longer in a trigger state.
As shown in fig. 5, in some embodiments, the proximity switch 3 is connected to a DI port of the ECU5, the plurality of motion output valves 4 are respectively connected to a plurality of DO/PWM ports of the ECU5, the buzzer 7 is connected to a DO port of the ECU5, and the ECU5 sends alarm information to the display 8 through a CAN bus.
In some embodiments, the aerial work platform further comprises:
an equipment console, communicatively connected to the ECU5, configured to output corresponding signals to the ECU5 according to instructions from an operator inside the aerial work platform, so as to control the opening and closing of the plurality of motion output valves 4;
the ECU5 is further configured to: and responding to the detection result of the proximity switch 3, when the second end of the steel wire rope 2 is not at the preset connection position, disconnecting the control of the equipment operating platform on the plurality of action output valves 4, and when the second end of the steel wire rope 2 is reconnected to the mounting bracket 1, reconnecting the control of the equipment operating platform on the plurality of action output valves 4.
When the squeezing occurs, the wire rope 2 is disconnected and the proximity switch 3 cannot detect the state of the wire rope 2. The active defense proximity switch 3DI port signal of the ECU5 is turned off, the DI port of the ECU5 is changed from high level to low level, and the control system determines that the active defense device is triggered, thereby causing a dangerous situation. At this time, the ECU5 controls the DO/PWM ports of the operation output valves 4 to be opened, and cuts off the output current, thereby ensuring that all operations are stopped immediately. The ECU5 shuts off the signal output from the control port of the engine 6 at the same time, so that the engine 6 shuts down and stops the power unit, thereby preventing the occurrence of an accident caused by the jamming of the operation control valve and the failure of the operation. The DO port of the buzzer 7 is electrified and connected, the low level is changed into the high level, and the buzzer 7 gives out sound and light alarm. The ECU5 sends alarm information to the display 8 through the CAN bus, and the display 8 displays active defense against faults.
After the operator breaks away from the dangerous state and manually resets the steel wire rope 2, the detection switch detects the steel wire rope 2, and the proximity switch 3 is switched on. At this time, the proximity switch 3DI input port of the ECU5 is electrically connected, and changes from low level to high level, so that the system determines that the dangerous state disappears. The DO control port is powered on when the engine 6 is turned off, and the engine 6 can be started normally. And the DO port of the buzzer 7 is powered off and is changed from high level to low level, and the audible and visual alarm disappears. The ECU5 communicates a cancel alarm message with the display 8.
As shown in fig. 4, in another aspect of the present disclosure, there is provided an active defense method for an aerial work platform, including:
the body posture of an operator in the aerial work platform is detected through a steel wire rope 2 with a first end fixedly arranged on the mounting bracket 1 and a second end detachably connected to the mounting bracket 1;
detecting whether the second end of the steel wire rope 2 is located at a preset connecting position of the mounting bracket 1 through a proximity switch 3;
when the second end of the steel wire rope 2 is not positioned at the preset connecting position, closing a plurality of action output valves 4 for controlling a plurality of maneuvering actions of the aerial work platform; and
and restarting the plurality of action output valves 4 when the second end of the steel wire rope 2 is reconnected to the mounting bracket 1.
In some embodiments, the active defense method further comprises:
when the second end of the steel wire rope 2 is not positioned at the preset connecting position, controlling the engine 6 to extinguish, enabling the buzzer 7 to give out sound and light alarm, and enabling the display 8 to display that the active defense device is in a triggering state; and
and when the second end of the steel wire rope 2 is connected to the mounting bracket 1 again, the engine 6 is restarted, the buzzer 7 stops giving out sound and light alarm, and the display 8 displays that the active defense device is not in a trigger state any more.
In some embodiments, the active defense method further comprises:
the proximity switch 3 is connected to a DI port of an ECU5, the operation output valves 4 are respectively connected to DO/PWM ports of the ECU5, the buzzer 7 is connected to a DO port of the ECU5, and the display 8 is connected to a CAN bus of the ECU 5;
when the proximity switch 3 detects that the second end of the steel wire rope 2 is not located at the preset connection position of the mounting bracket 1, the signal of the DI port is disconnected, so that the DI port of the ECU5 is changed from a high level state to a low level state; and
the ECU5 is disconnected from the DO/PWM port connected to the operation output valves 4, the DO port connected to the buzzer 7, and the CAN bus connected to the display 8.
In some embodiments, the active defense method further comprises:
when the proximity switch 3 detects that the second end of the steel wire rope 2 is at the preset connection position of the mounting bracket 1, switching on a signal of the DI port to change the DI port of the ECU5 from a low level state to a high level state; and
the ECU5 is connected to a DO/PWM port connected to the operation output valves 4, a DO port connected to the buzzer 7, and a CAN bus connected to the display 8.
In some embodiments, the active defense method further comprises:
when the second end of the steel wire rope 2 is not at the preset connection position, the control of the equipment operating platform on the plurality of action output valves 4 is disconnected; and
and when the second end of the steel wire rope 2 is reconnected to the mounting bracket 1, the equipment operating platform is reconnected to control the plurality of action output valves 4.
Therefore, according to the embodiment of the disclosure, whether the operator is in a safe operation position or not is detected in real time through the active defense device, and the high-altitude operation platform is controlled to be braked emergently when the operator is not in the safe operation position, so that the operator is prevented from being continuously injured.
In the prior art, mechanical protection in a structure extending mode is mainly adopted for protecting an aerial work platform and aerial work platform operators, the protection on the operators and equipment is incomplete and initiative, and continuous injury caused by continuous operation of the equipment when the operators are injured or lose safe driving positions cannot be avoided.
The safety protection device of the embodiment of the disclosure adopts a more positive mode to protect the aerial work platform and the operating personnel, and can quickly react to avoid danger or ensure that damage caused by the danger cannot be further strengthened and enlarged when the danger occurs. And the device can be combined with the original mechanical protection mode for use, so that more comprehensive and safer protection is provided for operators and equipment.
The control system of the invention mainly detects whether operators and equipment are in a dangerous state by an active defense device which is arranged on a working platform and is positioned above the operating position of the equipment. Under the normal working condition, the magnet of the steel wire rope 2 is attracted, the proximity switch 3 is conducted, the DI input port of the ECU5 is electrified, and the equipment can be operated normally without limit. Once the operating personnel is extruded due to misoperation or unexpected conditions, the body moves forwards to cause the disconnection of the steel wire rope 2, the signal of the proximity switch 3 is disconnected, the system immediately judges that the operating personnel of the aerial work platform is dangerous, the emergency braking equipment cuts off the power system, and the flameout engine 6 simultaneously gives out sound and light alarm to ensure that the operating personnel can not be continuously injured. After the operator confirms that the steel wire rope 2 is separated from the dangerous condition, the suction state of the steel wire rope is recovered, the equipment can normally operate, and the safety level of the aerial work platform and the operator is effectively improved.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. An aerial work platform, comprising:
a mounting bracket (1);
the first end of the steel wire rope (2) is fixedly arranged on the mounting bracket (1), and the second end of the steel wire rope is detachably connected to the mounting bracket (1) and used for detecting the body posture of an operator in the aerial work platform;
the proximity switch (3) is fixedly arranged on the mounting bracket (1) and used for detecting whether the second end of the steel wire rope (2) is located at a preset connecting position of the mounting bracket (1) or not;
the motion output valves (4) are used for controlling the starting and stopping of the plurality of maneuvering motions of the aerial work platform; and
an ECU (5) communicatively connected to the proximity switch (3) and the plurality of motion output valves (4), and configured to: and responding to the detection result of the proximity switch (3), closing the action output valves (4) when the second end of the steel wire rope (2) is not at the preset connection position, and restarting the action output valves (4) when the second end of the steel wire rope (2) is reconnected to the mounting bracket (1).
2. The aerial work platform of claim 1 further comprising:
an engine (6) for driving a hydraulic pump for supplying oil to the plurality of operation output valves (4);
the ECU (5) is communicatively connected to a control unit of the engine (6) and is further configured to: and responding to the detection result of the proximity switch (3), controlling the engine (6) to be switched off when the second end of the steel wire rope (2) is not at the preset connection position, and restarting the engine (6) when the second end of the steel wire rope (2) is reconnected to the mounting bracket (1).
3. The aerial work platform of claim 2 further comprising:
the buzzer (7) is used for giving out sound and light alarm; and
the display (8) is used for displaying the working state of the aerial work platform;
the ECU (5) is communicatively connected to the buzzer (7) and the display (8), and is further configured to: responding to the detection result of the proximity switch (3), when the second end of the steel wire rope (2) is not at the preset connection position, enabling the buzzer (7) to give out sound and light alarm, and enabling the display (8) to display that the active defense device is in a trigger state; when the second end of the steel wire rope (2) is connected to the mounting bracket (1) again, the buzzer (7) stops giving out sound and light alarm, and the display (8) displays that the active defense device is not in a triggering state any more.
4. The aerial work platform as claimed in claim 3, characterized in that the proximity switch (3) is connected to a DI port of the ECU (5), the plurality of motion output valves (4) are respectively connected to a plurality of DO/PWM ports of the ECU (5), the buzzer (7) is connected to a DO port of the ECU (5), and the ECU (5) sends alarm information to the display (8) through a CAN bus.
5. The aerial work platform of claim 1 further comprising:
the equipment operation platform is in communication connection with the ECU (5) and is configured to output corresponding signals to the ECU (5) according to instructions of an operator in the aerial work platform so as to control the opening and closing of the action output valves (4);
the ECU (5) is further configured to: and responding to the detection result of the proximity switch (3), when the second end of the steel wire rope (2) is not at the preset connection position, disconnecting the control of the equipment operating platform on the plurality of action output valves (4), and when the second end of the steel wire rope (2) is reconnected to the mounting bracket (1), reconnecting the control of the equipment operating platform on the plurality of action output valves (4).
6. An active defense method for an aerial work platform is characterized by comprising the following steps:
the body posture of an operator in the aerial work platform is detected through a steel wire rope (2) with a first end fixedly arranged on the mounting bracket (1) and a second end detachably connected to the mounting bracket (1);
detecting whether the second end of the steel wire rope (2) is located at a preset connecting position of the mounting bracket (1) or not through a proximity switch (3);
when the second end of the steel wire rope (2) is not positioned at the preset connecting position, closing a plurality of action output valves (4) for controlling a plurality of maneuvering actions of the aerial work platform; and
and restarting the plurality of action output valves (4) when the second end of the steel wire rope (2) is reconnected to the mounting bracket (1).
7. The active defense method of claim 6, further comprising:
when the second end of the steel wire rope (2) is not located at the preset connecting position, controlling an engine (6) to extinguish, enabling a buzzer (7) to give out sound-light alarm, and enabling a display (8) to display that the active defense device is in a trigger state; and
and when the second end of the steel wire rope (2) is reconnected to the mounting bracket (1), the engine (6) is restarted, the buzzer (7) stops giving out sound and light alarm, and the display (8) displays that the active defense device is no longer in a trigger state.
8. The active defense method of claim 7, further comprising:
connecting the proximity switch (3) to a DI port of an ECU (5), the plurality of operation output valves (4) are respectively connected to a plurality of DO/PWM ports of the ECU (5), the buzzer (7) is connected to the DO port of the ECU (5), and the display (8) is connected to a CAN bus of the ECU (5);
when the proximity switch (3) detects that the second end of the steel wire rope (2) is not located at the preset connection position of the mounting bracket (1), disconnecting the signal of the DI port to change the DI port of the ECU (5) from a high level state to a low level state; and
and disconnecting the DO/PWM port connected to the operation output valves (4), the DO port connected to the buzzer (7), and the CAN bus connected to the display (8) from the ECU (5).
9. The active defense method of claim 8, further comprising:
when the proximity switch (3) detects that the second end of the steel wire rope (2) is located at a preset connecting position of the mounting bracket (1), a signal of the DI port is switched on, and the DI port of the ECU (5) is changed from a low level state to a high level state; and
the ECU (5) is connected to a DO/PWM port connected to the operation output valves (4), a DO port connected to the buzzer (7), and a CAN bus connected to the display (8).
10. The active defense method of claim 6, further comprising:
when the second end of the steel wire rope (2) is not at the preset connection position, the control of the equipment operating platform on the plurality of action output valves (4) is disconnected; and
and when the second end of the steel wire rope (2) is reconnected to the mounting bracket (1), the equipment operating platform is reconnected to control the plurality of action output valves (4).
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| CN202010858500.4A CN111847327A (en) | 2020-08-24 | 2020-08-24 | Aerial work platform and active defense method |
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Application publication date: 20201030 |