CN107235458B - Detection device and detection method - Google Patents
Detection device and detection method Download PDFInfo
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- CN107235458B CN107235458B CN201710651548.6A CN201710651548A CN107235458B CN 107235458 B CN107235458 B CN 107235458B CN 201710651548 A CN201710651548 A CN 201710651548A CN 107235458 B CN107235458 B CN 107235458B
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 230000001960 triggered effect Effects 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims 2
- 230000007717 exclusion Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
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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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- 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
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
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- Engineering & Computer Science (AREA)
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- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a detection device, which is used for detecting a pit hole protection mechanism of an aerial work platform and comprises a down-in-place travel switch, a controller, a platform height sensor, a first pit hole protection travel switch and a second pit hole protection travel switch, wherein the down-in-place travel switch comprises a normally open channel and a normally closed channel, the first pit hole protection travel switch comprises a first normally open contact and a first normally closed contact, the second pit hole protection travel switch comprises a second normally open contact and a second normally closed contact, the first normally closed contact and the second normally closed contact are connected in parallel and are respectively arranged on a first line and a third line, the first normally open contact and the second normally open contact are connected in series and are arranged on the second line, the first line, the second line and the third line are connected in parallel, and the controller is connected with the first line, the second line, the third line, the platform height sensor and the down-in-place travel switch. The controller judges whether the logic of the travel switch is correct or not through logical exclusion, and the safety is improved. The invention also discloses a detection method.
Description
Technical Field
The invention relates to the technical field of detection of a hole protection mechanism of an aerial work platform, in particular to a detection device and a detection method.
Background
To the scissors fork aerial working platform of walking, pot hole protection mechanism on the chassis need open after the platform risees, if the platform risees the back pot hole protection shield not open or because the barrier blocks and leads to the pot hole protection shield not to open completely, there is the safety problem platform walking under these circumstances, even takes place the danger that the platform tumbled: therefore, a control system is needed to monitor and judge in real time, and whether the pit protection board is opened or not is detected, so that the safety of personnel and equipment is protected.
The existing pit protection scheme is that whether a pit protection switch is turned on or not is detected after a down-in-place travel switch is turned on, and when the pit protection switch is not turned on, the pit protection mechanism is judged to be not turned on, and a control system gives an alarm and limits lifting action. However, according to the EN280 standard, the prior art cannot meet the requirement, because when the in-place travel switch is pressed down, the pit hole protection board is opened or not, and the control system does not perform detection and judgment, when the in-place detection switch is stuck and fails, the prior art cannot protect equipment and personnel safety.
Therefore, how to provide a detection device to improve safety is a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a detection device to improve safety. Another object of the present invention is to provide a detection method based on the above detection device.
In order to achieve the purpose, the invention provides the following technical scheme:
a detection device for detecting a pothole protection mechanism of an aerial work platform comprises a lower in-place travel switch, a controller, a platform height sensor, a first pothole protection travel switch and a second pothole protection travel switch,
wherein the content of the first and second substances,
the lower in-place travel switch comprises a normally open channel and a normally closed channel,
the first pothole protection travel switch comprises a first normally open contact and a first normally closed contact, the second pothole protection travel switch comprises a second normally open contact and a second normally closed contact,
the first normally closed contact and the second normally closed contact are connected in parallel and are respectively arranged on a first line and a third line,
the first normally open contact is connected with the second normally open contact in series and is arranged on a second circuit,
the first line, the second line and the third line are arranged in parallel,
the controller is simultaneously connected with the first line, the second line and the third line, and is connected with the platform height sensor and the lower in-place travel switch.
Preferably, the aerial work platform is a scissor fork type, and the platform height sensor is an angle sensor.
The invention also provides a detection method, based on the detection device,
when the normally closed passage is pressed from a normally closed state to be normally opened, the platform height sensor detects that the height of the aerial work platform is h1, namely the bottom pressing height of the down-to-position travel switch,
when the normally open channel is pressed from the normally open state to be closed, the platform height sensor detects that the height of the aerial work platform is h2, namely the disengaging height of the lower-in-place travel switch,
the real-time height is h,
and detecting parameter values in advance by using the platform height sensor and the lower in-place travel switch: h1 and h2 are stored in the controller, and then the real-time judgment is carried out:
when h is greater than h2, the reaction mixture is,
the states should be: the first pothole protection travel switch is not triggered, the second pothole protection travel switch is not triggered, the first normally open contact and the second normally open contact are opened, the second line is in an open state, the first normally closed contact and the second normally closed contact are closed, the first line and the third line are in a closed state,
and the controller stops the platform lifting action when the states of the first line, the second line and the third line are different from the above states.
Preferably, an alarm is given while the platform is stopped from being lifted.
Preferably, when h ≦ h1, the state should be: the first pothole protection travel switch is triggered, the second pothole protection travel switch is triggered, the first normally open contact and the second normally open contact are closed, the second line is in a closed state, the first normally closed contact and the second normally closed contact are opened, and the first line and the third line are in an open state,
and the controller stops the platform lifting action when the states of the first line, the second line and the third line are different from the above states.
Preferably, an alarm is given while the platform is stopped from being lifted.
Preferably, when h1 is more than h and less than or equal to h2, the controller does not act.
The invention provides a detection device, which is used for detecting a pit hole protection mechanism of an aerial work platform and comprises a lower in-place travel switch, a controller, a platform height sensor, a first pit hole protection travel switch and a second pit hole protection travel switch, wherein the lower in-place travel switch comprises a normally open channel and a normally closed channel, the first pit hole protection travel switch comprises a first normally open contact and a first normally closed contact, the second pit hole protection travel switch comprises a second normally open contact and a second normally closed contact, the first normally closed contact and the second normally closed contact are connected in parallel and are respectively arranged on a first line and a third line, the first normally open contact and the second normally open contact are connected in series and are arranged on a second line, the first line, the second line and the third line are connected in parallel, and the controller is simultaneously connected with the first line, the second line and the third line and is connected with the platform height sensor and the lower in-place travel switch. When the scissor fork is used, the scissor fork is detected and judged to be in which working state through the lower in-place switch and the platform height sensor. When normally closed channel is pushed down from the state of normally closed and becomes normally open, platform height sensor detects aerial working platform's height and is h1, the height that arrives at the end of pushing down of travel switch that targets in place promptly, when normally open channel is pushed down from the state of normally open and becomes closed, platform height sensor detects aerial working platform's height and is h2, the travel switch that targets in place promptly breaks away from the height, real-time height is h, utilize platform height sensor and the travel switch that targets in place down to detect out the parameter value in advance: h1 and h2 are stored in the controller, and then the real-time judgment is carried out: when h > h2, the state should be: first pothole protection travel switch is not triggered, second pothole protection travel switch is not triggered, first normally open contact with second normally open contact opens, the second circuit is the off-state, first normally closed contact with the second normally closed contact is closed, first circuit with the third circuit is the on-state, the controller obtains first circuit the second circuit with the state of third circuit is different with above-mentioned state, stops the platform and rises the action. Thereby improving safety.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions in the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a detection apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first circuit, a second circuit, and a third circuit according to an embodiment of the present invention.
In the above FIGS. 1-2:
the device comprises an angle sensor 1, a first normally open contact 2, a first normally closed contact 3, a first pothole protection travel switch 4, a first circuit 5, a second circuit 6, a third circuit 7, a second normally open contact 8, a second normally closed contact 9, a pothole protection mechanism 10 and a lower in-place travel switch 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a detection device according to an embodiment of the present invention in use; fig. 2 is a schematic structural diagram of a first circuit, a second circuit, and a third circuit according to an embodiment of the present invention.
The detection device provided by the embodiment of the invention comprises a lower in-place travel switch 11, a controller, a platform height sensor, a first pit protection travel switch 4 and a second pit protection travel switch, wherein the lower in-place travel switch 11 comprises a normally open channel and a normally closed channel, the first pit protection travel switch 4 comprises a first normally open contact 2 and a first normally closed contact 3, the second pit protection travel switch comprises a second normally open contact 8 and a second normally closed contact 9, the first normally closed contact 3 and the second normally closed contact 9 are connected in parallel and are respectively arranged on a first line 5 and a third line 7, the first normally open contact 2 and the second normally open contact 8 are connected in series and are arranged on a second line 6, the first line 5, the second line 6 and the third line 7 are connected in parallel, and the controller is simultaneously connected with the first line 5, the second line 6 and the third line 7 and is connected with the platform height sensor and the lower in-place travel switch 11. When the scissor fork is used, firstly, the lower in-place switch 11 and the platform height sensor are used for detecting and judging which working state the scissor fork is in. When normally closed channel is pushed down from the state of normally closed and becomes normally open, platform height sensor detects aerial working platform's height and is h1, the height that presses to the end of travel switch 11 that targets in place promptly, when normally open channel is pushed down from the state of normally open and becomes closed, platform height sensor detects aerial working platform's height and is h2, the travel switch 11 that targets in place promptly breaks away from the height, real-time height is h, utilize platform height sensor and the travel switch 11 that targets in place down to detect out the parameter value in advance: h1 and h2 are stored in the controller, and then real-time judgment is carried out: when h > h2, the state should be: first pothole protection travel switch 4 is not triggered, second pothole protection travel switch is not triggered, first normally open contact 2 and second normally open contact 8 are opened, second circuit 6 is the off-state, first normally closed contact 3 and second normally closed contact 9 are closed, first circuit 5 and third circuit 7 are the on-state, the state that the controller obtained first circuit 5, second circuit 6 and third circuit 7 is different with above-mentioned state, stop the platform and rise the action. Thereby improving safety.
And an alarm is given while the platform is stopped from lifting. Further improving the safety.
When h is less than or equal to h1, the first pothole protection travel switch 4 is triggered, the second pothole protection travel switch is triggered, the first normally-open contact 2 and the second normally-open contact 8 are closed, the second line 6 is in a closed state, the first normally-closed contact 3 and the second normally-closed contact 9 are opened, the first line 5 and the third line 7 are in a disconnected state,
when the controller obtains that the states of the first line 5, the second line 6, and the third line 7 are different from the above states, the controller stops the stage raising operation. And an alarm is given while the platform is stopped from lifting.
When h1 is more than h and less than or equal to h2, the controller does not act.
Wherein, aerial working platform is for cutting the fork, and platform height sensor is angle sensor 1. The height of the scissor fork, i.e. the height of the platform, is calibrated by the angle sensor 1.
Specifically, the detection device provided in the embodiment of the present invention adds a pit protection travel switch mutual detection function, and has two sets of contacts in the travel switches, one set of normally open contacts and one set of normally closed contacts, the normally open contact set is connected in series, and the two sets of normally closed contact sets are connected in parallel, and are respectively connected to the controller, the controller judges whether the logic of the travel switch is correct through logical mutual exclusion, and detects the logic states of the scissor in the collection state and the lifting state, thereby detecting whether the travel switch is normal. The detection device provided by the embodiment of the invention is additionally provided with the angle sensor 1, the height of the scissor fork is calibrated through the angle sensor 1 and is also the height of the platform, two height values h1 and h2 are set, h1 is the height when the lower-in-place travel switch 11 is pressed to the bottom, h2 is the separation height of the lower-in-place travel switch 11, when the real-time height h is greater than h2, the lower-in-place travel switch 11 is not compressed at the moment, and h1 is less than h2.
Before the judgment, two height values h1 and h2 are measured by combining the lower arrival position switch 11 and the angle sensor 1, namely, when the normally closed passage is pressed from a normally closed state to be normally opened, the platform height sensor detects that the height of the aerial work platform is h1, namely the height of the lower arrival position travel switch 11 pressed to the bottom, and when the normally opened passage is pressed from the normally opened state to be closed, the platform height sensor detects that the height of the aerial work platform is h2, namely the separation height of the lower arrival position travel switch 11.
Then, the angle sensor 1 and the lower in-place switch 11 are used for detecting and judging which working state the scissor fork is in:
1. when h is less than or equal to the position of h1, the pothole protection mechanism 10 is in a retraction state at this time, the logic set by the programs of the pothole travel switches (namely, the first pothole protection travel switch 1 and the second pothole protection travel switch) is that the first line 5 and the third line 7 are in a low level (0V), because the first line 5 and the third line 7 are in an off state at this time, the second line 6 is in a high level (24V), because the second line 6 is in a closed state at this time, if the logic input by the pothole travel switch is not consistent with the logic set by the programs in practice, the pothole is prompted to give an alarm, the output signal controlled by the programs is turned off, and the platform is stopped from lifting.
2. When h1 is less than or equal to h2, the pothole protection mechanism 10 is in the instant state of retraction and opening in the interval, and the normally closed electric shock and the normally open electric shock of the pothole travel switch are coincident at the moment, so that pothole protection detection is not carried out in the range, namely the controller does not act.
3. When h is greater than h2, the pit protection board is required to be opened at this time, the logic set by the program of the pit protection switch is that the first line 5 and the third line 7 are at a high level (24V), because the first line 5 and the third line 7 are in a closed state at this time, the second line 6 is at a low level (0V), because the second line 6 is in an open state at this time, if the logic input by the pit travel switch is inconsistent with the logic set by the program, the pit alarm is prompted, the output signal controlled by the program is turned off, and the platform lifting action is stopped.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A detection device is used for detecting a pothole protection mechanism of an aerial work platform and is characterized by comprising a lower in-place travel switch, a controller, a platform height sensor, a first pothole protection travel switch and a second pothole protection travel switch,
wherein the content of the first and second substances,
the lower in-place travel switch comprises a normally open channel and a normally closed channel,
the first pothole protection travel switch comprises a first normally open contact and a first normally closed contact, the second pothole protection travel switch comprises a second normally open contact and a second normally closed contact,
the first normally closed contact and the second normally closed contact are connected in parallel and are respectively arranged on a first circuit and a third circuit,
the first normally open contact is connected with the second normally open contact in series and is arranged on a second line,
the first line, the second line and the third line are arranged in parallel,
the controller is simultaneously connected with the first line, the second line and the third line, and is connected with the platform height sensor and the lower in-place travel switch.
2. The detection apparatus of claim 1, wherein the aerial work platform is a scissor fork and the platform height sensor is an angle sensor.
3. A detection method, based on the detection device of claim 1,
when the normally closed passage is pressed from a normally closed state to be normally opened, the platform height sensor detects that the height of the aerial work platform is h1, namely the bottom pressing height of the down-to-position travel switch,
when the normally open channel is pressed from the normally open state to be closed, the platform height sensor detects that the height of the aerial work platform is h2, namely the disengaging height of the lower-in-place travel switch,
the real-time height is h, and the parameter values are detected in advance by using the platform height sensor and the lower in-place travel switch: h1 and h2 are stored in the controller, and then the real-time judgment is carried out:
when h ≦ h1, the state should be: the first pothole protection travel switch is triggered, the second pothole protection travel switch is triggered, the first normally open contact and the second normally open contact are closed, the second line is in a closed state, the first normally closed contact and the second normally closed contact are opened, and the first line and the third line are in an open state,
when the controller obtains that the state of the first line, the second line and the third line is different from the state of h being less than or equal to h1 when h is less than or equal to h1, stopping the lifting action of the platform;
when h1 is more than h and less than or equal to h2, the controller does not act;
when h > h2, the state should be: the first pothole protection travel switch is not triggered, the second pothole protection travel switch is not triggered, the first normally open contact and the second normally open contact are opened, the second line is in an open state, the first normally closed contact and the second normally closed contact are closed, and the first line and the third line are in a closed state,
and when the controller obtains that the states of the first line, the second line and the third line are different from the state of h & gt h2 when h & gt h2 is obtained, stopping the lifting action of the platform.
4. A method of testing according to claim 3, wherein an alarm is provided simultaneously with the stopping of the platform raising action.
5. A method of testing according to claim 3, wherein an alarm is provided simultaneously with the stopping of the platform raising action.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710651548.6A CN107235458B (en) | 2017-08-02 | 2017-08-02 | Detection device and detection method |
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| CN201710651548.6A CN107235458B (en) | 2017-08-02 | 2017-08-02 | Detection device and detection method |
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| CN107235458B true CN107235458B (en) | 2023-02-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107827024B (en) * | 2017-12-11 | 2023-06-30 | 湖南杰希重工有限公司 | Combined aerial work platform scissor fork type lifting limiting mechanism and working method |
| CN108640027B (en) * | 2018-05-14 | 2023-10-27 | 湖南衡波特种玻璃科技有限公司 | Lifting operation platform capable of being automatically positioned to working height |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0551895U (en) * | 1991-12-20 | 1993-07-09 | セイレイ工業株式会社 | Workbench position detector for aerial work platforms |
| CN202704941U (en) * | 2012-05-28 | 2013-01-30 | 宁波远景汽车零部件有限公司 | Elevator with automatic chain detecting device |
| CN204643774U (en) * | 2015-04-20 | 2015-09-16 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Hole, a kind of high-altitude operation platform hole protection switch inhibiting device |
| CN206126787U (en) * | 2016-11-01 | 2017-04-26 | 赵铭竹 | A scram circuit for stacker |
| CN207243402U (en) * | 2017-08-02 | 2018-04-17 | 湖南星邦重工有限公司 | A kind of detection device |
-
2017
- 2017-08-02 CN CN201710651548.6A patent/CN107235458B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0551895U (en) * | 1991-12-20 | 1993-07-09 | セイレイ工業株式会社 | Workbench position detector for aerial work platforms |
| CN202704941U (en) * | 2012-05-28 | 2013-01-30 | 宁波远景汽车零部件有限公司 | Elevator with automatic chain detecting device |
| CN204643774U (en) * | 2015-04-20 | 2015-09-16 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Hole, a kind of high-altitude operation platform hole protection switch inhibiting device |
| CN206126787U (en) * | 2016-11-01 | 2017-04-26 | 赵铭竹 | A scram circuit for stacker |
| CN207243402U (en) * | 2017-08-02 | 2018-04-17 | 湖南星邦重工有限公司 | A kind of detection device |
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