CN102502413B - Safety monitoring method for crane monitor - Google Patents
Safety monitoring method for crane monitor Download PDFInfo
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- CN102502413B CN102502413B CN 201110349313 CN201110349313A CN102502413B CN 102502413 B CN102502413 B CN 102502413B CN 201110349313 CN201110349313 CN 201110349313 CN 201110349313 A CN201110349313 A CN 201110349313A CN 102502413 B CN102502413 B CN 102502413B
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Abstract
The invention discloses a safety monitoring method for a crane monitor, and belongs to the field of safety monitoring of cranes. The method comprises the following steps of: acquiring three-phase electric voltage signals, and detecting whether a phase defaults; detecting whether a three-phase electric voltage phase sequence is accurate; detecting whether a crane has an action request; detecting whether the crane is in a double-machine coordination state; and processing the action request of the crane and calculating the operating parameters of the crane. By the safety monitoring method for the crane monitor, the use safety accidents of the crane are reduced, the operating safety of the crane is improved, monitoring of multiple operating data of the crane is provided, the requirement of a user for control of the crane can be met, a double-machine coordination function is provided at the same time, integral safety monitoring when multiple machines work simultaneously becomes possible, and the crane runs more safely, more stably and more effectively.
Description
Technical field
The present invention relates to a kind of method for safety monitoring of hoisting crane monitor, in more detail, relate to the method that a large amount of crane operating data of a kind of basis is analyzed the hoisting crane running state and provided the operation suggestion, belong to crane safety monitoring field.
Background technology
Usually the method for safety monitoring of hoisting crane monitor mainly is judgement that whether hoisting crane is overloaded and the record of some operating datas of hoisting crane.This method for supervising is simple to operate, and is easy to maintenance, but function ratio is more single.Because hoisting crane belongs to special equipment, aging and the wearing and tearing of apparatus are bigger to the Safety Effect of operation, aging and the degree of wear of its each major part generally can reflect by data such as special parameter such as SWP, BRSWP, monitor above parameter, can learn current hoisting crane operation conditions, residue period of service information such as (number of operations) indirectly, according to these information, operating personal can carry out component inspection and maintenance in time, thereby the accident that prevents effectively takes place.And the method for safety monitoring of the hoisting crane monitor of present stage has often been ignored calculating and record to hoisting crane special parameter SWP, BRSWP.And the hoisting crane monitor of present stage often can not be supported the multi-machine collaborative monitoring, like this, when multi-machine collaborative is worked, has just seemed inefficiency.
Summary of the invention
The purpose of this invention is to provide a kind of method for safety monitoring of safe, accurate, reliable, stable, hoisting crane monitor that degree of automation is high and with low cost, be used for avoiding owing to the single job safety hidden danger that exists of existing hoisting crane monitoring function.
To achieve these goals, the present invention adopts following technical scheme: a kind of method for safety monitoring of hoisting crane monitor is characterized in that comprising the steps:
1) hoisting crane work system and monitor parameters are set;
2) obtain the three-phase electricity voltage signal, whether detect phase shortage, if phase shortage to the monitor telltale, and is forbidden the hoisting crane action with information updating, otherwise changeed next step;
3) whether detection three-phase electricity voltage phase sequence is correct, if the phase sequence mal arrives the monitor telltale with information updating, and forbids the hoisting crane action, otherwise changes next step;
Whether have action request, if do not have, the monitor telltale is arrived in information updating, otherwise change next step if 4) detecting hoisting crane;
5) detect hoisting crane and whether be in the double computer cooperation state, if be in the double computer cooperation state, obtain collaborative machine running state, if collaborative machine operation mal, the monitor telltale is arrived in information updating, and forbid the hoisting crane action, if collaborative machine operation normally or not is to be in the double computer cooperation state, change next step;
6) handle the hoisting crane action request;
7) calculate the hoisting crane operational factor, the monitor telltale is arrived in information updating.
The beneficial effect of the inventive method is, reduce hoisting crane and used safety misadventure, improved the safety of hoisting crane operation, and provide the monitoring of the multiple operating data of hoisting crane, can satisfy the user to the demand of hoisting crane control aspect, the function of double computer cooperation is provided simultaneously, and the general safety monitoring when multimachine is worked simultaneously becomes possibility, makes the hoisting crane operation safer, more steady, more effective.
Description of drawings
Fig. 1 represents to realize the hardware block diagram of the method for safety monitoring of hoisting crane monitor;
Fig. 2 represents the diagram of circuit of the method for safety monitoring of hoisting crane monitor;
Whether Fig. 3 represents to differentiate in the three-phase electricity trace routine diagram of circuit of phase shortage;
Fig. 4 represents in the three-phase electricity trace routine to differentiate whether correct diagram of circuit of phase sequence;
Fig. 5 represents in the three-phase electricity trace routine to differentiate whether correct schematic diagram of phase sequence;
Fig. 6 represents to handle in the method for safety monitoring of hoisting crane monitor the diagram of circuit of hoisting crane action request signal;
Fig. 7 represents the diagram of circuit of display unit in the method for safety monitoring of hoisting crane monitor;
Fig. 8 represents the transition change of read-out when user's query manipulation of hoisting crane monitor;
Fig. 9 represents the transition change of read-out when the user sets reference value of hoisting crane monitor;
Figure 10 represents the transition change of read-out under the hoisting crane running state of hoisting crane monitor;
Figure 11 represents the transition change of read-out under the password input environment of hoisting crane monitor;
The specific embodiment
Below in conjunction with specific embodiments and the drawings the present invention is done description in further detail.
Fig. 1 is the hoisting crane monitor hardware block diagram of realizing method for safety monitoring of the present invention, mainly is provided with a processing unit 110, a memory cell 120, an input block 130, an output unit 140, a display unit 150 and a communication unit 160.Input block 130 mainly is provided with three phasevoltage input equipment 131, hoisting crane action request signal input device 132, hoisting crane gravitational cue input equipment 133, crane motor current signal input equipment 134 and keyboard signal input equipment 135.Output unit 140 mainly is provided with to rise and allows on-off signal outdevice 141, decline to allow on-off signal outdevice 142, acceleration to allow on-off signal outdevice 143 and programmable switch signal output apparatus 144.
The method for safety monitoring of hoisting crane monitor of the present invention divides from software module, comprising: the storing step of a different pieces of information is stored into the different pieces of information of hoisting crane monitor by the input block input in the storage element; One treatment step, processing unit judges that according to the different pieces of information that is stored in the storage medium operation conditions of hoisting crane provides the operation suggestion; One step display, processing unit shows different data according to the different running statees of hoisting crane and user's different operating at read-out.With this, can judge the operation conditions of hoisting crane and information is fed back to the user by monitoring unit and read-out according to the different operating datas that the hoisting crane monitor obtains, guarantee that hoisting crane operates under the safe mode of operation all the time.
Above-mentioned software module comprises a kind of hoisting crane monitor reference value setting program, and it comprises: a reference value storing step, and the reference value of setting different pieces of information is stored in reference value in the memory cell in advance by processing unit; Whether one treatment step, the processing unit value by different pieces of information is greater than or less than reference value is judged whether the hoisting crane running state is normal, thereby each side is understood the hoisting crane running state.
Above-mentioned software module comprises a kind of hoisting crane monitor information inquiry program, this hoisting crane monitor keyboard signal input equipment 135 is provided with four buttons, a button is to determine key, can realize entering of menu and determining of parameter modification, a button is ESC Escape, can realize abandoning of the withdrawing from of menu, the return when numeral is selected and parameter modification.Two buttons are respectively options button up and down in addition, can realize the selection up and down of scroll-up/down and the numeral of menu.With this, the user can be implemented in the inquiry of different pieces of information by the different operating to keyboard signal input equipment 135.Data are presented on the display unit 150.
Above-mentioned software module comprises a kind of hoisting crane monitor load monitoring program, and it comprises: a storing step, and the hoisting crane monitor calculates load gravity information by the mode of external weight sensor, and it is stored in corresponding memory cell; One step display, the user can check the gravity information of hoisting heavy by operation push-button at read-out; One treatment step, whether processing unit overloads according to the ratio in judgement hoisting crane of load gravity information and rated load, nominal load, and provides corresponding relay control signal and display information.With this, when crane loading load during greater than the certain ratio of hoisting crane rated load, nominal load, monitor can force to stop the rising behavior of crane hook, therefore, can avoid the hoisting crane long-term work under the working environment more than the rated load, nominal load, prolong the service life of hoisting crane, guarantee work safety.
Above-mentioned software module comprises a kind of hoisting crane monitor three-phase electricity trace routine, it comprises: a storing step, monitor three-phase main power source phase sequence and three phasevoltage in real time, and it is stored in corresponding memory cell, one step display, the user can check three phasevoltage information at read-out by operation push-button; One treatment step if processing unit is found phase sequence mistake or phase shortage, can provide corresponding relay control signal and display information.With this, when hoisting crane work voltage mal, monitor can be forbidden the crane hook knee-action, can guarantee that hoisting crane works under the voltage environment of safety.
Above-mentioned software module comprises a kind of hoisting crane low rate start low speed shut down procedure, and it comprises: a storing step, and the action behavior each time of processing unit real time recording crane hook, and it is stored in the corresponding memory cell; One step display, the user can check crane hook rising number of times, decline number of times, low cruise number of times, high-speed cruising number of times, low cruise time, high-speed cruising time and operation total time at read-out by button; One treatment step, whenever the crane hook running state changes, processing unit all can according to circumstances give certain state variation delay time.With this, the state of crane motor can not undergone mutation, and can prevent the high starting current that direct high-speed starter motor brings, and has stopped the high-speed brake undue wear that causes that stops to move down yet, has prolonged hoisting crane service life.
Above-mentioned software module comprises a kind of hoisting crane monitor special parameter handler, processing unit goes out SWP and BRSWP according to load, the number of starts and lifting Time Calculation, this value objectively responds the hoisting crane work life-span, the client can understand the life situations of hoisting crane by checking this value, has avoided the client hoisting crane remaining life not to be understood the potential safety hazard of bringing.
Above-mentioned software module comprises a kind of hoisting crane monitor double computer cooperation program, and the user sends to processing unit 110 by the operation to keyboard signal input equipment 135 with double computer cooperation information, realizes the common operation of two hoisting cranes.When a hoisting crane et out of order can not be worked, this hoisting crane processing unit 110 can send to collaborative machine with failure message, and collaborative machine receives information and also can stop operation, the safety in the time of can improving the operation of hoisting crane double computer cooperation greatly like this.
Above-mentioned software module comprises a kind of hoisting crane work setting program processed, and the user can realize the setting of hoisting crane work system by the operation to keyboard signal input equipment 135.The parameter that different hoisting cranes has is often different.Hoisting crane work setting program processed has improved the comformability of safety method for supervising for different hoisting cranes.
Above-mentioned software module also comprises a kind of hoisting crane monitor cryptoguard program; the hoisting crane monitor is provided with multistage password; the user who only has corresponding password just can enter the menu that has corresponding authority, makes things convenient for the hoisting crane supvr of different stage to information inquiry and the management of hoisting crane.
Fig. 2 provides the diagram of circuit of the method for safety monitoring of hoisting crane monitor of the present invention.
Main flow comprises the steps S1～S6:
Step S1, three phasevoltage input equipment 131 are input to processing unit with three-phase voltage signal, and processing unit obtains the three-phase electricity voltage signal, and in order correctly to judge whether phase shortage of three-phase electricity, the present invention adopts following method.Fig. 3 has provided and whether has differentiated the diagram of circuit of phase shortage.At first, in step SA1, set variable MAX=0 earlier, MIN=380, T=0, wherein MAX is used for depositing the maxim that certain phase voltage reaches in the one-period, MIN is used for depositing the minimum value that certain phase voltage reaches in the one-period, and T is controlled by a time meter, is used for the record sampling number.In step SA2, when T＜0.02s, sampling number is very few, sampling obtains the one-period that data can not this phase voltage of perfect representation, therefore needs to continue sampling, as T〉during 0.02s, the data that sampling obtains can represent the one-period of this phase voltage, and therefore sampling finishes.In step SA3, the resultant magnitude of voltage of will sampling leaves among the variable Ua.In step SA4, as Ua〉during MAX, in step SA5, upgrade the value of MAX, on the contrary do not need to upgrade.In step SA6, when Ua＜MIN, in step SA7, upgrade the value of MIN, otherwise do not need to upgrade.In step SA9, this phase voltage pressure reduction and reference value in one-period compared judge whether this phase voltage is normal.If three-phase electricity is pressed with any phase voltage mal, then be judged to be phase shortage.Processing unit 110 is transferred to display unit 150 with phase shortage information, helps the client to understand the hoisting crane fault cause, and transmission information is forbidden the hoisting crane action to output unit 140.
Step S2, three phasevoltage input equipment 131 are input to processing unit with three-phase voltage signal, and processing unit obtains the three-phase electricity voltage signal, and whether correct for differentiating phase sequence, the present invention adopts following method, and Fig. 4 has provided and differentiated whether correct diagram of circuit of phase sequence.In step SB1, according to the method for step S1 among Fig. 2, obtain the maxim of A phase voltage, then in step SB2, seek B simultaneously, the C two-phase gets voltage max, and the record hunting time, in step SB3, relatively seek the time that B, C two phase voltages spend, if the time that searching B phase spends is greater than seeking the time that the C phase spends, i.e. tb-ta〉tc-ta, then show the phase sequence mistake, otherwise phase sequence is correct, as shown in Figure 5.Equally, if the phase sequence mistake, processing unit 110 is transferred to display unit 150 with the phase sequence mis-information, helps the client to understand the hoisting crane fault cause, and transmission information is forbidden the hoisting crane action to output unit 140.
Step S3, hoisting crane action request signal input device 132 sends to processing unit 110 with the action request of hoisting crane, if there is not the action request signal, then processing unit 110 sends to display unit 150 with gravity information.If detect the action request signal, in step S4, processing unit 110 at first judges by inquiry double computer cooperation zone bit whether this hoisting crane is in the double computer cooperation state, if be in the double computer cooperation state, 110 of processing units can be communicated by letter with collaborative machine by communication unit 160, determine whether collaborative machine operation is normal, if collaborative machine operation mal then reports fault not allow the hoisting crane action, otherwise enter the action treatment step.Every hoisting crane has an independent ID, and the user can realize double computer cooperation work by the ID of the collaborative hoisting crane of operation keyboard signal input device 135 inputs.In the double computer cooperation mode of operation, when arbitrary hoisting crane breaks down, all can failure message be sent to collaborative hoisting crane by communication unit 160, forbid the vertical motion of collaborative hoisting crane, thereby guaranteed the reasonableness of lifting, improved the safety of collaborative work.
In step S5, processing unit 110 will be handled this action request, and Fig. 6 has provided the diagram of circuit of handling hoisting crane action request signal in the method for safety monitoring of hoisting crane monitor.In step SC1, at first processing unit 110 signal that 134 transmission come according to crane motor current signal input equipment judges whether motor starts, if motor starts, the expression hoisting crane is in course of action, and then the gravity information that directly is transferred to processing unit 110 according to hoisting crane gravitational cue input block 133 judges whether hoisting heavy overloads.If motor does not also start, forbid that then direct two-speed starts, processing unit sends to instruction to descend and allows on-off signal outdevice 142 or rise to allow on-off signal outdevice 141 and accelerate to allow on-off signal outdevice 143, allow hoisting crane one quick-action work and forbid its two-speed operation, the big electric current of having avoided the hoisting crane high-speed starting to bring like this.In step SC3, processing unit gives a time-delay, and to guarantee that crane motor normally starts, this time-delay can arrange by software; Step SC4, the signal that is transferred to processing unit 110 according to crane motor current signal input equipment 134 judges whether motor starts again, if motor starts, then operation is normal, if motor does not also start, then break down, processing unit 110 sends to display unit 150 with failure message.And notice decline allows on-off signal outdevice 142, rising allows on-off signal outdevice 141 and accelerate permission on-off signal outdevice 143, forbids the hoisting crane action.Among the step SC6, if processing unit 110 detects the acceleration request of hoisting crane, then allow hoisting crane to accelerate operation.Processing unit also can give a time-delay to guarantee that crane motor normally starts after the step SC6, forwards step SC4 again to.
In step S6, processing unit 110 comprises that with the operational factor of hoisting crane total run time, lifting circulation total degree, low cruise time, high-speed cruising time, the number of starts that makes progress, the downward number of starts, three phasevoltage, this lifting time etc. are stored in the memory cell 120.And go out SWP, BRSWP by these calculation of parameter.The value that calculates is stored in the memory cell 120.Wherein, the computing formula of SWP is:
The computing formula of BRSWP is: the BRSWP=number of starts/1000000, SWP
NRepresentative lifting load G
tThe back residue trouble free service cycle, SWP
N+1Representative lifting load G
tThe preceding trouble free service cycle, T representative lifting load G
tTime of run (unit: hour), G
NRepresent hoisting crane rated load, nominal load (unit: ton), G
tRepresent hoisting crane actual load (unit: ton).
Before above-mentioned steps S1, earlier hoisting crane work system, monitor working parameter and multistage password are set.The setting of multistage password is used for making things convenient for the supvr of different stage to inquiry and the management of hoisting crane, and the user can enter the menu that has corresponding authority after by the checking of multistage password and operate.In above-mentioned steps, the user can realize the inquiry to different pieces of information and lastest imformation by the operation to operation keyboard signal input equipment 135 different keys on the monitor.
The user can check the running state of hoisting crane by display unit 150, and Fig. 7 has provided the diagram of circuit of display unit program in the method for safety monitoring of hoisting crane monitor.In step SD1, at first confirm operating language.The user of different language custom can select to be fit to the operating language of oneself.Confirm mode of operation in step SD2, at different hoisting cranes, different mode of operation is arranged, step SD2 has determined to use the type of hoisting crane.The display unit 150 of hoisting crane monitor mainly contains three mode of operations, and namely pattern is inquired about and arranged to gravity display format, running state display format and menu.Display unit 150 at first enters the gravity display format, namely among the step SD3.In the gravity display format, whole telltale only shows hoisting crane load gravity, and the purpose of doing like this is that clear display is bright and clear, makes things convenient for the user to check.Confirm in user's operation keyboard signal input device 135 that button can enter the demonstration operation state mode, i.e. step SD5.In step SD5, the user can check load gravity information, real time execution information and the failure message of hoisting crane.Figure 10 has provided the transition change of read-out under the hoisting crane running state of hoisting crane monitor.Screen LCD1001 shows that there are two faults in hoisting crane, and has shown one of them fault " overload ", and this moment, the user can check another fault by operation keyboard signal input device 135 downward selection keys, as screen LCD1002.If the user has learnt this failure message, can determine button by operation keyboard signal input device 135, the deletion failure message, as screen LCD1003, screen LCD1004, screen is shown in screen LCD1005 after whole deletions.At arbitrary interface, namely among screen LCD1001, screen LCD1002, screen LCD1003, screen LCD1004 or the screen LCD1005, the user can get back to gravity display interface LCD1006 by return key in the operation keyboard signal input device 135.If the user wants to know more a lot of heavy-duty machine operation informations, can be by determining in the operation keyboard signal input device 135 in screen LCD1005 that key enters interface for password input, the password that the user inputs appropriate level can enter the menu inquiry and pattern is set, and namely step SD9 is to step SD12.According to the different passwords of user's input, the user has different authorities, and Figure 11 has provided the transition change of read-out under the password input environment of hoisting crane monitor.
The user can check the operational factor of hoisting crane by different menu in the operation keyboard signal input device 135 selection display units 150.Fig. 8 has provided the transition change of read-out when user's query manipulation of hoisting crane monitor.The data that the user can inquire about have data such as SWP, BRSWP, total run time, lifting circulation total degree, low cruise time, high-speed cruising time, the number of starts that makes progress, the downward number of starts, three phasevoltage and this machine ID.
The user can select the parameter of different menu modification hoisting crane monitor in the display unit 150 by operation keyboard signal input device 135.Fig. 9 has provided the transition change of read-out when the user sets reference value of hoisting crane monitor.The user can by operation keyboard signal input device 135 upwards selection key or downwards selection key in interfaces such as screen LCD0901, screen LCD0910 and screen LCD0912, switch, realize the selection of menu at the same level.After determining to select the user that function is set, the user can determine that by operation keyboard signal input device 135 button enters the menu screen LCD0902 of subordinate under screen LCD0901 state.In screen LCD0903, the user can by the operation keyboard signal input device about in the of 135 options button in screen LCD0903, screen LCD0904 and screen LCD0905, switch to reach the purpose of selective relay 5 functions.
The invention discloses the method for safety monitoring of hoisting crane monitor, rely on the monitoring to the hoisting crane operational factor that the crane safety monitoring function is provided, satisfy reliable, the stable requirement of security monitoring system of hoister.
Claims (7)
1. the method for safety monitoring of a hoisting crane monitor is characterized in that comprising the steps:
1) obtains the three-phase electricity voltage signal, whether detect phase shortage, if phase shortage to the monitor telltale, and is forbidden the hoisting crane action with information updating, otherwise changeed next step;
2) whether detection three-phase electricity voltage phase sequence is correct, if the phase sequence mal arrives the monitor telltale with information updating, and forbids the hoisting crane action, otherwise changes next step;
Whether have action request, if do not have, the monitor telltale is arrived in information updating, otherwise change next step if 3) detecting hoisting crane;
4) detect hoisting crane and whether be in the double computer cooperation state, if be in the double computer cooperation state, obtain collaborative machine running state, if collaborative machine operation mal, the monitor telltale is arrived in information updating, and forbid the hoisting crane action, if collaborative machine operation normally or not is to be in the double computer cooperation state, change next step;
5) handle the hoisting crane action request;
6) calculate the hoisting crane operational factor, by described hoisting crane operational factor compute certain parameters SWP, BRSWP and record, the monitor telltale arrived in information updating,
Wherein, the computing formula of parameter S WP is:
The computing formula of B parameter RSWP is: the BRSWP=number of starts/1000000, SWP
NRepresentative lifting load G
tThe back residue trouble free service cycle, SWP
N+1Representative lifting load G
tThe preceding trouble free service cycle, T representative lifting load G
tTime of run, G
NRepresent the hoisting crane rated load, nominal load, G
tRepresent the hoisting crane actual load.
2. the method for safety monitoring of hoisting crane monitor according to claim 1 is characterized in that described method also comprises the setting step of hoisting crane parameter, is used for setting hoisting crane work system and monitor working parameter.
3. the method for safety monitoring of hoisting crane monitor according to claim 1 is characterized in that described method also comprises setting and the verification step thereof of multistage password, conveniently has the hoisting crane supvr of different rights to information inquiry and the management of hoisting crane.
4. the method for safety monitoring of hoisting crane monitor according to claim 1 is characterized in that described method also comprises hoisting crane monitor information inquiry step, and the user is by realizing the inquiry to different pieces of information to the operation of different key on the monitor.
5. whether according to the method for safety monitoring of the arbitrary described hoisting crane monitor of claim 1～4, it is characterized in that detecting in the described step 1), the method for phase shortage may further comprise the steps:
21) set variable MAX=0, MIN=380, T=0, wherein MAX is used for depositing the maxim that certain phase voltage reaches in the one-period, and MIN is used for depositing the minimum value that certain phase voltage reaches in the one-period, and T is controlled by a time meter, is used for the record sampling number;
22) when T＜0.02s, sampling number is very few, and sampling obtains the one-period that data can not this phase voltage of perfect representation, continues sampling, as T〉during 0.02s, the data that sampling obtains represent the one-period of this phase voltage, and sampling finishes;
23) the resultant magnitude of voltage of will sampling leaves among the variable Ua;
24) as Ua〉during MAX, upgrade the value of MAX, otherwise do not need to upgrade;
25) when Ua＜MIN, upgrade the value of MIN, otherwise do not need to upgrade;
26) pressure reduction and the reference value of phase voltage in one-period compared, judge whether this phase voltage is normal, if three-phase electricity is pressed with any phase voltage mal, then is judged to be phase shortage, otherwise is judged to be not phase shortage.
6. according to the method for safety monitoring of the arbitrary described hoisting crane monitor of claim 1～4, it is characterized in that described step 2) whether correct method may further comprise the steps middle detection three-phase electricity voltage phase sequence:
31) maxim of searching A phase voltage, record hunting time ta;
32) seek the maxim of B, C phase voltage simultaneously, record hunting time tb, tc;
33) relatively seek the time that B, C phase voltage spend, if seek time that the B phase spends greater than seeking the time that the C phase spends, i.e. tb-ta〉tc-ta, then show the phase sequence mistake, otherwise phase sequence is correct.
7. according to the method for safety monitoring of the arbitrary described hoisting crane monitor of claim 1～4, it is characterized in that the step of processing hoisting crane action request in the described step 5) is specific as follows:
41) judge according to the crane motor current signal whether motor starts, if electric motor starting is then carried out following steps:
A. judge whether hoisting heavy overloads, the monitor telltale is arrived in information updating if overload then will overload, and forbids the hoisting crane action, otherwise changes next step;
B. detect whether acceleration request is arranged, if there is acceleration request then to allow hoisting crane to accelerate operation, otherwise allow the hoisting crane low cruise to forbid that it accelerates operation;
42) if motor does not start, then allow the hoisting crane low cruise to forbid that it accelerates operation;
43) after time-delay a period of time, judge again whether motor starts, if electric motor starting then is updated to the monitor telltale with normal operation information, if motor does not also start, then failure message is updated to the monitor telltale, and forbid the hoisting crane action.
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| CN108439222A (en) * | 2018-05-10 | 2018-08-24 | 河钢股份有限公司承德分公司 | Crane remote control detects resetting apparatus, remote control system and crane automatically |
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| CN101077756B (en) * | 2007-06-23 | 2010-10-06 | 深圳市中信康特种设备技术有限公司 | Erecting equipment remote actual time safety monitoring system and its control method |
| KR100933992B1 (en) * | 2007-12-28 | 2009-12-28 | 울산대학교 산학협력단 | How to predict crane collision |
| JP5380747B2 (en) * | 2009-09-16 | 2014-01-08 | 株式会社日立製作所 | Monitoring system and monitoring method under suspended load |
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2011
- 2011-11-08 CN CN 201110349313 patent/CN102502413B/en not_active Expired - Fee Related
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