DE4108969A1 - COMPUTER-CONTROLLED HOISTING SYSTEM WITH AT LEAST TWO HOISTS - Google Patents

Abstract

In a computer-controlled system for lifting loads, particularly for stages and multi-purpose halls comprising - at least two independently controllable hoists (4a, 4b), - a control computer (1) for individually monitoring the system and controlling the individual hoists, which carries out an actual/nominal value comparison, - an operating terminal (5), - an operating computer (6) for administering the operating terminal (5) and transmitting travel commands to the control computer (1), - a network (2) for connecting control computer (1), operating computer (6), operating terminal (5) and the individual hoists (4a, 4b), it is provided according to the invention that - the network (2) is a ring network and that - the control computer (1) has a multi-channel structure with at least two channels (1a, 1b) and independently carries out the actual/nominal value comparison in each channel (1a, 1b) as well as alternately a monitoring of each channel (1a, 1b) by the other one (1b, 1a) and, when safety-relevant deviations are detected, stops the system for lifting loads via switch-off lines, which are designed to have at least two channels, the actual/nominal value comparison including at least a detection of the position and of the state of movement of the individual systems for lifting loads (4a, 4b, ...), a weight sensing, a monitoring for slack chains and a monitoring for the synchronous running of hoists (4a, 4b, ...) connected in a group. <IMAGE>

Description

The invention relates to a computer-controlled hub train system with at least two hoists, in particular especially suitable for stages and multi-purpose halls is.

Lifting hoists are to be understood as: Can move loads. Hoists consist of one Drive and the associated structure, such as. B. Chain hoists and wire rope hoists. With the hoist system sol len, for example, one described in more detail below "artificial" lace and attached to it Public address and lighting systems in height be driven. The "artificial" process Lacing is made possible by the fact that several Hoists are grouped together.

The system must be securely locked be steady, because the "artificial" lace (weighing several tons) over an audience can be located.

From DE-A-32 33 468 is a controller for one Lace-up machinery known to everyone Drive is assigned to an autonomous computer. All Drive computers are shared with one  Switching computer to a common collection line connected. An operator terminal is a Operator computer assigned to the operator computer is connected. The drive computers position data of your supplied to each drive; you control and monitor depending on commands from the operator calculator their drive including the Errech regulation and regulation of speeds and give Position data and error messages for mediation solution calculator. The operator computer monitors and ver controls command buttons, switches and displays of the Operator terminals, interprets groups together positions of drives, stores data chains for predetermined movements and transmits driving command to the attendant computer. The mediator The management computer monitors the data traffic to and from Operating computer, as well as from and to the drives or Drive computers, it keeps lists of actual values all drives and persistent error conditions, constantly checks the data paths to all others Computers and carries out the necessary in the event of an error Switching measures by. The drive computer calculates continuously evaluating direction of travel, Speed and group composition command the target position of your drive and initiate leave in case of deviations between actual and target position the necessary corrections.

If discrepancies between actual and Target position that exceeds a predetermined maximum value step, the drives are switched off.

The drive computer performs a security check testing for the drives and yourself, especially a trailing error and slack rope  surveillance, as well as monitoring of preliminary and Emergency limit switches.

The switching computer is via a serial Interface and a serial reserve cut place, and associated lines with the operator computer connected, and in the event of data it automatically switches to the reserve interface around.

The position data are the switching computer the actual value transmitter is fed in, it checks groups compilations of drives, regardless of the drive computers of the groups, the synchronism the drives within the groups by comparison position data.

The control panel has one or more masters switch on for group combinations of Drives via the operating computer the group travel speed and direction lichen.

This known control has a number of safe ones technical disadvantages. It is not like that the regulations of the accident prevention regulation Stages and studios (VGB 70) of the administrative and Professional associations. They also comply with this tax not meet the safety requirements according to DIN V 19250 01/89 and VDE 0801 10/90 basic Safety considerations for MCR protection directions.

Weight detection is used in the prior art not made, which is a security risk poses. If a weight is attached to the drives,  which is greater than the maximum allowable load is in the suspension point of the respective drive, then there is a risk of the roof cones collapsing structure. A shift in weight within one Group, for example by slipping the attached Kon structure or by failure of a hoist, can also to an impermissible load on the roof lead construction. Is z. B. a truss con structure by several drives at the same time brought a desired height, this also hides Dangers in itself.

Under truss constructions such. B. wood, Steel or aluminum truss constructions stand. By combining several trusses an "artificial" lacing is formed. At this "Artificial" laces are then z. B. lighting fixed and public address systems. Is this First, the weight of the attached load may be too high break the truss construction, or it exists Risk of the maximum load on the hangers points is exceeded. Because in multi-purpose halls regularly no weight recording devices are present is an estimate of the Roof structure necessary for hanging loads what is not a reproducible method, on the one hand leads to mistakes.

Furthermore, the usual computers are single-channel leads. A single-channel operator calculator harbors the danger that occurring System errors are not recognized because no Ver equal to the process data takes place. The mediator lation calculator is through a two-channel Data line equipped with the operating computer, but if the operating computer fails, the  Control panel can no longer be worked. When off in the case of the operator computer, there could then be no load be moved out of the danger area. This Ge Driving is made possible by the possibility of operation errors due to a very large number of loads serve keys - according to DE-A-32 33 468 there are about 300 Keys, 250 LEDs and 100 numerical displays decades necessary - increased.

The invention has for its object a rech non-controlled hoist system of the type mentioned Kind of providing the above mentioned security safety requirements and in particular a Overloading the roof structure, the truss cone structure or individual hoists. Here should endanger personnel, artists and audience are prevented. Furthermore should such a hoist system to relieve the burden on people nals to be easy and clear to use.

This task is done with a computer-controlled Hoist system with

• - At least two independently controllable Hoists,
• - A control computer to monitor the Systems and control of each hub trains an actual / setpoint comparison performs,
• - an operator terminal,
• - An operating computer to manage the Operator terminals and transmission of Commands to the control computer,
• - a ring network to connect tax computer, control computer, control terminal and of the individual hoists, whereby  the control computer has a two-channel structure owns independently in each channel carries out the actual / setpoint comparison and if discrepancies are found, Hoist system via two channels led shutdown lines shut down, whereby within the scope of the actual / setpoint Compare at least one capture the position and the state of motion of the individual hoists, one weight detection, a slack chain over monitoring and synchronization monitoring of hoists connected in a group is made

solved.

The hoist system according to the invention is based on a two-channel tax calculator, i.e. a tax computer with two programmable logic controls stungen ("SPS"), which has a coaxial ring network the hoists, the operator terminal and the operator computer is connected. Through the two-channel The structure of the tax system is redundant det; even if one channel fails, the other is Control of the system guaranteed. At the same time fin a monitoring of a channel by the others instead. If there are deviations between the Channels found that have a given tole exceed the range, the system becomes silent other specified measures are set initiated. Mutual surveillance of the the channels take into account any time that occurs shifts in the parallel computing ops rations by specifying a time interval,  within which agreement must exist.

The operator computer is assigned to the operator terminal net, but the operator terminal regardless of Operator computer can be used. This is especially true especially necessary if there is still a single stroke trains must be operated. For group calls the drive, however, is the use of the operator prefer computer. Accordingly, this allows Hoist system according to the invention both single trips as well as group connections of the respective Drives.

The control computer is informed about the actual value transmitter current position of the drives communicated, likewise, preferably via known strain gauges fen, the respective load of the individual hoists. All group hoists in motion on synchronism, load and height position, all motors that are at a standstill standing and load checked. When moving the individual trains are checked for height position and Load.

At the same time, the control computer preferably leads Lists with the maximum permissible loads of the up suspension points, if exceeded, the entire System is stopped and if necessary preceded level, safety-related measures carried out relief of the suspension points by returning to a starting position. Feh Messages are forwarded to the operator computer given and presented on it.

The control computer also constantly checks the Data traffic in the coaxial ring network and leads  Faults the specified, safety-related Measures, such as the decommissioning of the hoist or returning to a predetermined or off gear position.

The operator computer monitors and manages the Command buttons, switches and operator displays minals, interprets group compositions of the individual hoists, stores data chains for pre given motion sequences and transmits driving commands to the control computer.

The hoist system has a permanently installed tes height measurement system, which is in the actual / setpoint ver is included in the tax calculator. At Grup The individual hoists are driven on a single pen the allowable height deviation within the Group monitors around suspended truss structure ions not to destroy and shift weight within a group of hoists and thereby to avoid induced overloads the.

A weight detection on the individual drives preferably arranged load measuring devices allows load balancing within a group to recognize exercises and if the perm tolerance to stop and give the drives if necessary, initiate further measures.

When falling below a specified minimum load a single hoist train or a group of hoist train what, for example, when sitting on a tra verse or the bottle of a hoist on a hint dernis can occur, there is also an Ab circuit of the system to avoid a hazard  To prevent slack chain formation.

A slack chain shutdown when the stroke is not loaded trains must take place so that danger to people be avoided. Opens an unloaded hoist an obstacle, the hook remains at this point bottle lying and the chain continues to descend (Formation of slack chains).

If this condition remains unnoticed, the hook fla fall to the ground and when falling, a per son hurt. A slack chain shutdown at loaded hoists that move in a group the following problem can be avoided. Be is the group from z. B. four drives and There are three hoists to hit an obstacle relieved, there is a risk of overload for the fourth hoist. A punctual arises Load, which is a risk of overloading the drive, of the traction device (breakage of the chain or rope) includes or the permissible ceiling load in this suspension point can be exceeded. The same point overload can occur if three hoists of the group described above the same fail early.

All security-relevant data are independent of the network gig stored, preferably in a battery buffered RAM of the control computer. Preferably he there is still a storage of all during the Operating data, especially the mi nimal or maximum occurring loads, within of the control computer to ensure a reproducible event receive and retrieve the design protocol to document and occurring operating errors animals.  

Preferred embodiments of the Invention described with reference to the drawings. It demonstrate:

Fig. 1 shows schematically the connection of the individual components of the Hubzugsystems,

Fig. 2 shows schematically the two-channel link control computer with the individual drives,

Fig. 3 shows schematically the two-channel control computer link with the terminal,

Fig. 4 schematically shows the link operating computer with the two-channel control computer,

Fig. 5 shows schematically the coaxial ring network,

Fig. 6 shows a possible stage design.

Fig. 1 shows the assignment of the individual components to each other. The two-channel control computer ( 1 ) has access to the operator terminal ( 5 ), the operator computer ( 6 ) and the individual drives ( 4 a, 4 b, 4 c, 4 d,... 4 n) via the coaxial ring network ( 2 ). .

Fig. 2 shows the two-channel structure of the control computer, in which each of the channels ( 1 and 2 ) has independent access to the data and the ring network. All data from the drives to the control computer are read from both channels of the control computer and a comparison between the channels takes place. This measure above all prevents multiple errors and prevents misinformation from interfering with the operational process. If the comparison leads to deviating values, the system is shut down or other, predetermined measures are initiated.

The clock of the system is determined by an increment giver who also specified the timing regulates the channels. The weight is recorded via strain gauges (strain gauges), which over load Frequency converter (LSW) and frequency-voltage wall (FSW) the recorded values to the channels of the Pass on the tax calculator. In case of overload, over the emergency stop switch and the motor contactors of the concerned and the other engines turned off.

The data are also checked by the operator terminal according to FIG. 3 and by the operator computer according to FIG. 4 in the channels of the control computer.

Fig. 5 shows the coaxial ring network with a main loop and a sub loop. There is z. If, for example, a fault in the main loop to channel ( 1 ), the sub loop is immediately switched over.

Fig. 6 shows a possible application example. A music group appears on the stage and lighting and sound systems must be positioned above the stage. First the "artificial" lacing is moved to working height with the hoists. Then z. B. jukeboxes on the stage Ren, which can now be attached to any point of the "artificial" Chen laces, if the maximum permissible load in the suspension points is not exceeded.

Claims (12)

1. Computer-controlled hoist system, especially for stages and multi-purpose halls, with

• - At least two independently controllable hoists ( 4 a, 4 b),
• - A control computer ( 1 ) for monitoring the system and controlling the individual hoists ( 4 a, 4 b), which carries out an actual / setpoint comparison,
• - an operating terminal ( 5 ),
• - an operating computer ( 6 ) for managing the operating terminal ( 5 ) and transmitting travel commands to the control computer ( 1 ),
• - A ring network ( 2 ) for connecting the control computer ( 1 ), control computer ( 6 ), control terminal ( 5 ) and the individual hoists ( 4 a, 4 b), characterized in that
• - The control computer ( 1 ) has a two-channel structure ( 1 a, 1 b) and independently performs the actual / setpoint comparison in each channel ( 1 a, 1 b) as well as mutually monitoring each channel ( 1 a, 1 b) by the each other ( 1 b, 1 a) and, if deviations are detected, shut down the hoist system via two-channel shutdown lines, with at least one detection of the position and movement status of the individual hoists ( 4 a, 4 b,...), A weight detection, a slack chain monitoring and a synchronism monitoring of hoists connected in group ( 4 a, 4 b,...) Is undertaken.

2. hoist system according to claim 1, characterized records that the weight detection over Deh stripes. 3. Hoist system according to one of claims 1 or 2, characterized in that a detection of the total weight and the individual hoists ( 4 a, 4 b,...) 4. hoist system according to claim 3, characterized in that in addition a detection of the weight of group hoists ( 4 a, 4 b,...) Is carried out. 5. Hoist system according to one of claims 1 to 4, characterized in that the actual / setpoint comparison is carried out using a process image stored in the control computer ( 1 ). 6. hoist system according to claim 5, characterized indicates that the process image has a tolerance area whose lower or upper range tion causes the lifting system to be shut down. 7. hoist system according to one of claims 1 to 6, characterized in that the actual / target value comparison of the weight detection based on PRE-ben, in the control computer ( 1 ) stored maximum loads of the supporting structure and the individual hoists ( 4 a, 4 b,... ) he follows. 8. hoist system according to claim 7, characterized in that the control computer ( 1 ) lists with maximum permissible loads of the suspension points and he initiates safety measures when these permissible loads are exceeded. 9. hoist system according to claim 8, characterized in that when the permissible loads are exceeded as a control computer ( 1 ) the system shuts down. 10. hoist system according to one of claims 1 to 10, characterized in that all safety re relevant data is stored independent of the network. 11. hoist system according to one of claims 1 to 10, characterized in that the operating sequence within the control computer ( 1 ) is stored retrievably. 12. hoist system according to one of claims 1 to 11, characterized in that the operating terminal ( 5 ) can be used independently of the operating computer ( 6 ).