CN216784766U - Experimental table for EMS (energy management system) conveying system of vehicle general assembly line - Google Patents

Abstract

The utility model relates to a laboratory table for an EMS (energy management system) conveying system of a vehicle assembly line. In order to test each controller in the EMS delivery system online or offline, a laboratory bench for a vehicle assembly line EMS delivery system includes: the master controller is used for the EMS conveying system; a safety controller; a drive frequency converter for the spreader; at least one motor for the spreader; industrial mobile industrial computer and route concentrator, wherein, total controller, safety controller, drive converter and industrial mobile industrial computer pass through route concentrator communication connection, at least one motor is connected to on the drive converter. On one hand, potential safety risks can be avoided through the experiment table, production safety is guaranteed, and meanwhile actual vehicle production cannot be influenced; in another aspect, the lab bench may have a variety of uses, such as testing controllers, performing fault simulation, and as a training facility for maintenance personnel of the EMS delivery system.

Description

Experimental table for EMS (energy management system) conveying system of vehicle general assembly line

Technical Field

The utility model relates to a laboratory table for an EMS (energy management system) conveying system of a vehicle assembly line.

Background

In the final assembly plant of a complete vehicle plant, the entire vehicle or engine is usually lifted due to process requirements in order to install components or to assemble the engine for the vehicle body or the vehicle chassis. There may also be several hoisting lines in one general assembly plant for hoisting the vehicle or the engine separately.

EMS conveying systems are mostly used in modern vehicle factories for lifting conveying vehicles or engines. EMS is generally called electric Monorail System. The EMS transportation system mainly includes a trolley line rail, a plurality of spreaders (also called self-propelled trolleys), and a plurality of controllers.

In the equipment maintenance of the assembly plant, the maintenance of the EMS delivery system is important because the failure of such main line equipment directly affects the equipment execution rate, resulting in production stoppage. However, since hundreds, even hundreds, of spreaders may be automatically operated at the same time in the final assembly plant, the occurrence of a failure is difficult to avoid. Common faults include, for example, out of tolerance lifting, code reading errors or communication errors, etc. However, since a plurality of controllers cooperate and communicate with each other in the EMS delivery system, there is a possibility that it is difficult to determine the problem when a failure occurs. Moreover, if the upper controller spare is replaced and put into operation directly in the EMS delivery system, particularly in its spreader, there may be a potential safety risk that is detrimental to ensuring production safety. However, since the control of the EMS delivery system is distributed control, it has not been possible in the prior art to test the control function of the controller spare part without departing from the EMS delivery system actually operating. In addition, because the maintenance of the spreader can be performed only in the overhaul section of the EMS transportation system, the spreader after maintenance can be checked to determine whether the spreader is operating normally or not by entering the production cycle again. If there is a problem, the maintenance personnel can only wait for the spreader to go through the production cycle and return to the maintenance section again, which is undoubtedly time-consuming, affects production and even presents a safety risk.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a laboratory table for an EMS conveying system of a vehicle assembly line, which can test each controller in the EMS conveying system under the online or offline state, avoids safety risks and does not influence production.

In order to achieve the above object, the present invention provides that a laboratory bench for a vehicle assembly line EMS delivery system includes:

the master controller is used for the EMS conveying system;

a safety controller;

a drive frequency converter for the spreader;

at least one motor for the spreader;

an industrial mobile industrial personal computer; and

a routing hub;

the master controller, the safety controller, the driving frequency converter and the industrial mobile industrial personal computer are in communication connection through the routing concentrator, and the at least one motor is connected to the driving frequency converter.

The utility model provides a specific construction of a test bench for a vehicle assembly line EMS conveying system, namely, a whole set of control layout for the vehicle assembly line EMS conveying system is constructed on a controller level in the test bench. The control arrangement comprises at least: the system comprises a master controller used for an EMS conveying system, a safety controller, a driving frequency converter used for a lifting appliance, at least one motor used for the lifting appliance, an industrial mobile industrial personal computer and a routing concentrator. And the communication connection among the master controller, the safety controller, the driving frequency converter and the industrial mobile industrial personal computer is realized through a routing concentrator. For simplicity, the general controller, the safety controller, the driving frequency converter and the industrial mobile industrial personal computer are collectively referred to as a controller hereinafter.

Here, the general controller for the EMS transportation system is used as an upper computer of each controller of the EMS transportation system to control each spreader in the EMS transportation system as a whole. The overall controller can be designed, for example, as a central Programmable Logic Controller (PLC). In some EMS delivery systems, the overall Controller may be referred to as a zone Controller (SC Controller), a Standard Drive Controller (SDC Controller), or a Dynamic Drive Controller (DDC Controller). For example, the master controller realizes the scheduling of all the lifting appliances according to the height meter.

The safety controller relates to safety detection and safety function control of multiple spreaders/single spreader. The safety controller is mainly used for the acquisition, transmission and control of safety signals, for example to perform safety speed and/or safety braking and/or safety limit functions by detecting sensor signals of sensors and/or performing safety signal communication, for example to output a safety Torque Off signal (STO signal, Safe Torque Off) to a drive converter for a spreader in case of danger to personnel or production. Examples of applications for the safety logic controller are the MOVISAFE module, HM31 module, ET200SP module.

The industrial mobile industrial personal computer can reliably operate in an industrial environment. In this case, the industrial mobile control computer can be used, for example, to monitor the operation and communication of the individual controllers (e.g. to check the ID and IP of the individual controllers connected thereto, fault codes), to adjust the parameters of the individual controllers (e.g. the enforcement variables, e.g. the brake application times) and to generate an alarm in the event of a fault.

The routing hub, also known as an industrial switch, is configured as an active network component that can be used to build a network for each controller and to enable the exchange of data and signals between each controller, for example, to output data and/or signals from one controller to a designated other controller. The network can be, for example, an ethernet network, in particular PROFINET. An example for a routing hub is scalnce. Without limitation, bus communications, such as PROFIBUS, DeviceNet, and MODBUS, are also contemplated.

The driving frequency converter for the lifting appliance is an electronic device capable of controlling the speed of the alternating current motor, and can generate and output alternating current voltage with variable amplitude and/or frequency to the motor on the basis of constant alternating current voltage based on control logic and/or control signals so as to control the walking speed and/or lifting speed of the lifting appliance. The drive inverter thus serves both as a controller for the motor and as a drive power supply for the motor. Examples for driving the frequency converter are: MOVIPRO, MOVIFIT, G120D, etc. drive the frequency converter.

The at least one motor for the spreader acts as an actuator or actuator in the test bench according to the utility model. The maintenance personnel can specifically test the control operation of the control layout by observing the movement (such as the rotation start and stop, the rotation direction, the rotation speed and the like) of the at least one motor, thereby effectively and intuitively testing the main control function of the EMS conveying system for the vehicle assembly line. It is also possible to simulate abnormal loading or seizing by applying resistance or braking to the at least one motor.

The inventive test bench enables an efficient restoration of a distributed control topology in an EMS transport system of a vehicle assembly line, creates an organic operating environment for the individual controllers, enables the individual controllers to interact in a coordinated manner in the test bench, i.e. exchange signals and data with one another, and enables the control functions of the controllers to be performed at least in part. Thus, the laboratory bench according to the utility model enables testing of the different controllers involved in an EMS delivery system without detaching the EMS delivery system and its spreader. This means that the individual components in the laboratory bench are not involved in the actual operation of the EMS delivery system, nor are the spreaders performing the walking and lifting. In the laboratory bench according to the utility model, only the respective controllers and the main actuators (i.e. motors) that are supposed to be in the EMS delivery system and its spreader are integrated independently of the EMS delivery system. The experiment table does not comprise a track, a sliding contact line, a suspension mechanism or a transmission mechanism of a lifting appliance and the like of the EMS conveying system. The test bench realizes offline or offline test of each controller of the EMS conveying system, so that potential safety risks are avoided, production safety is guaranteed, and actual vehicle production is not influenced.

Furthermore, the laboratory bench according to the utility model can have diverse applications.

First, the controller may be tested in the laboratory bench. For this purpose, a controller spare part to be installed in the vehicle assembly line EMS conveying system or a problem controller replaced from the vehicle assembly line EMS conveying system can be installed in a laboratory bench and operated for a period of time, such as three hours, six hours, one day or even several days, in a control layout built in the laboratory bench, so that whether a report error occurs within a specified time can be observed, and whether the controller spare part or the problem controller is qualified can be judged.

Second, fault simulation can be performed in the laboratory bench. In this case, fault situations can be created artificially in the laboratory bench, for example by disconnecting the communication connection of the one or more controllers, interrupting the supply connection of the one or more controllers, disconnecting the at least one electric motor from the drive converter, braking the output shaft of the at least one electric motor and inputting incorrect parameters in the controller, etc. In this way, it is possible to observe whether the control layout as a whole and/or the controllers involved are able to respond and/or report errors as expected.

Furthermore, it is advantageous that the laboratory bench according to the utility model also serves as a training facility for maintenance personnel of the EMS delivery system. Since teaching directly in the vehicle assembly line EMS delivery system is at great risk and may adversely affect production, training of maintenance personnel, such as installation and connection of individual controllers, replacement of spare parts, error handling, etc., can be safely carried out on the test bench close to the actual operating conditions.

It should be noted that each controller in the laboratory bench should be regarded as being able to implement its control function by its own hardware circuit (e.g., an integrated circuit or a logic circuit, an electronic circuit system such as a programmable logic circuit system, a field programmable gate array, or a programmable logic array) and, if necessary, by a preloaded instruction and/or parameter at the time of its factory delivery. In the laboratory bench according to the utility model, a control layout for an EMS transport system with basic functions can be built up by connecting the individual controllers.

According to one embodiment of the utility model, the safety controller comprises a static safety logic controller and a dynamic safety logic controller. Here, the static safety logic controller refers to a safety logic controller that is fixedly arranged, and the dynamic safety logic controller refers to a safety logic controller that is arranged on the spreader and moves with the spreader. The static safety logic controller and the dynamic safety logic controller can communicate with each other to ensure the safe operation of a single spreader and all spreaders in a region.

According to one embodiment of the utility model, the driving frequency converter for the lifting appliance comprises a walking driving frequency converter and a lifting driving frequency converter. In particular, the at least one motor comprises a travel motor and/or a lift motor, wherein the travel motor is connected to a travel drive frequency converter and the lift motor is connected to a lift drive frequency converter. The travel drive frequency converter and the lift drive frequency converter can be drive frequency converters of different types. Particularly, the lifting driving frequency converter can also be used as an upper computer of the walking driving frequency converter to control the walking driving frequency converter and the walking motor.

According to one embodiment of the utility model, at least one rope encoder is mounted on the elevator motor for measuring the stroke of the elevator motor, said rope encoder being in signal connection with the safety controller. In order to detect the operation of the elevator motor and in particular to test the safety limiting function of the safety controller, a stay cord encoder can be mounted on the output shaft of the elevator motor, which can measure the displacement of the elevator motor that should cause the spreader to move up and down, thereby testing whether the elevator motor operates according to a height schedule table. Furthermore, it is possible to test whether the control unit should be brought to an emergency stop and/or output a fault code in the event of a production or personnel safety hazard by means of the pull-cord encoder.

According to one embodiment of the utility model, the laboratory bench comprises an operating handle which is connected to a drive frequency converter, in particular a lifting drive frequency converter. In this case, the operating handle can be used as a remote control in the EMS transport system itself for manually controlling the lifting motor and/or the walking motor. By connecting the operating handle to the drive frequency converter, in particular the lifting drive frequency converter, the maintenance personnel can manually control the at least one motor. This is particularly advantageous for teaching training of the vehicle assembly line EMS delivery system, since without actual movement of the spreader, the connection of the operating handle, switching of the manual mode, manipulation of the spreader for walking and/or lifting, exit from the manual mode, etc. can be carried out by maintenance personnel without safety risks. In addition to this, it is also possible to eliminate or confirm a failure in the drive frequency converter or the motor by the manual mode of the operating handle.

According to one embodiment of the utility model, the laboratory bench comprises a linear positioning device, the linear positioning device comprises a reading head and a code strip, and the reading head of the linear positioning device is in communication connection with the safety controller. Here, the linear positioning device is also called pcv (position Code version) positioning system, which determines the position of the read head on the whole barcode strip by reading the two-dimensional Code or barcode on the barcode strip through the read head, and then determines the transverse position of the spreader in the EMS transportation system. Advantageously, only a code strip of limited length can be provided on the laboratory table, so that position reading, position calibration can be carried out on the laboratory table. Further, accidental movement of the spreader can be simulated manually by moving the position of the reader head to see if the safety controller responds as expected. However, it is also conceivable to provide a long code strip on the test stand and to provide said code strip with an automatic winding and unwinding device in order to simulate a travel test of the spreader.

According to one embodiment of the utility model, the laboratory bench comprises a power supply device which supplies 380V AC to the drive frequency converter and supplies 24V DC to at least the general controller, the safety controller, the routing hub and the industrial mobile industrial personal computer by means of an AC-DC converter.

According to one embodiment of the utility model, the power supply device is provided with a safety interlock circuit in which an emergency stop switch and a two-contact relay actuated by means of the emergency stop switch are arranged. Because the experiment table comprises the equipment operated by 380V alternating current, in order to enhance the safety guarantee, the power supply equipment is provided with a safety interlocking circuit comprising an emergency stop switch and a double-contact relay, so that the safety of the experiment table is enhanced, and the safety of maintenance personnel is ensured.

According to one embodiment of the utility model, in order to further guarantee the electrical safety, the metal housing of each component in the laboratory bench is equipped with a safety earth conductor.

According to one embodiment of the utility model, a sensor terminal box is connected to the safety controller, in particular to the dynamic safety logic controller, and collects sensor signals of at least one of a belt breakage sensor, an overload sensor, a road wheel speed feedback sensor, a zero position detection sensor and a motor rotation sensor. Various faults that may occur in an EMS delivery system can be advantageously simulated in a laboratory bench by connecting the sensor junction box and one or more of the above sensors.

According to one embodiment of the utility model, the laboratory bench comprises a rack, and the safety controller, the driving frequency converter and the routing hub are arranged on the rack in a wall-mounted manner. Through the frame can integrate the whole set of distributed control overall arrangement in vehicle assembly line EMS conveying system with succinct, compact and the mode of being convenient for operate. When testing the controller spare part, the maintenance personnel only need to replace it into the specified position of the laboratory bench, and do not need to adjust other components and cable connections in the laboratory bench. By the mode, a maintenance person is given a clear position and wiring indication, and misconnection, misconnection and the like in the replacement and connection process are avoided as much as possible. When fault simulation is carried out, maintenance personnel can observe whether corresponding fault codes appear on a segment type LED nixie tube display equipped with the controller or not at a glance without walking based on the compact arrangement structure. And for training teaching, the arrangement mode is convenient to operate and demonstrate.

Other features of the utility model will be apparent from the accompanying drawings and from the detailed description. All the features and feature combinations mentioned above in the description and also features and feature combinations mentioned below in the description and/or shown in the figures individually can be used not only in the respectively given combination but also in other combinations or in isolation.

Drawings

FIG. 1 is a schematic block diagram of a first embodiment of a laboratory bench for a vehicle assembly line EMS delivery system according to the present invention, showing the connections of the various components in the laboratory bench to each other;

FIG. 2 is a schematic block diagram of a second embodiment of a laboratory bench for a vehicle assembly line EMS delivery system according to the present invention, showing the connections of the various components in the laboratory bench to each other;

FIG. 3 is a schematic block diagram of a third embodiment of a laboratory bench for a vehicle assembly line EMS delivery system according to the present invention, showing the connections of the various components in the laboratory bench to each other;

FIG. 4 illustrates a schematic power supply for a laboratory bench for a vehicle assembly line EMS delivery system according to the present invention;

FIG. 5 shows a schematic circuit diagram of a safety interlock circuit associated with the power supply unit; and

fig. 6 shows a schematic arrangement of a laboratory bench for a vehicle assembly line EMS delivery system according to the present invention.

Detailed Description

Fig. 1 shows a schematic block diagram of an embodiment of a laboratory bench for a vehicle assembly line EMS delivery system according to the utility model, in which the connections of the individual components in the laboratory bench are shown.

In fig. 1, a test stand 1 for a vehicle assembly line EMS delivery system includes: the system comprises a master controller 2, a safety controller 3, a driving frequency converter 4 for a lifting appliance, at least one motor 5 for the lifting appliance, an industrial mobile industrial personal computer 6 and a routing hub 7, wherein the master controller 2, the safety controller 3, the driving frequency converter 4 and the industrial mobile industrial personal computer 6 are in communication connection through the routing hub 7, and the at least one motor 5 is connected to the driving frequency converter 4.

In the specific construction of the above experimental table 1, a whole set of control layout for the vehicle general assembly line EMS delivery system is constructed on the controller level: the master controller 2 for the EMS conveying system is used as an upper computer of each controller of the EMS conveying system; the safety controller 3 relates to safety detection and safety function control of a plurality of spreaders/a single spreader; the driving frequency converter 4 for the lifting appliance is an electronic device capable of controlling the speed of the alternating current motor; the industrial mobile industrial personal computer 6 is used for monitoring the operation and communication conditions of each controller, adjusting the parameters of each controller and giving an alarm when a fault occurs; the routing hub 7 is used to build a network for the respective controllers and to enable data and signals to be exchanged between the respective controllers. The at least one motor 5 for the spreader acts as an actuator or actuator in the test bench 1.

The routing hub 7 is preferably used to build an ethernet network, in particular an industrial ethernet network (PROFINET), for the respective controller. Therefore, RJ-45 interfaces are pre-installed on the master controller 2, the safety controller 3, the driving frequency converter 4 and the industrial mobile industrial personal computer 6. Network cables, in particular PROFINET cables, are preferably used between the routing concentrator 7 and the overall controller 2, the security controller 3, the drive frequency converter 4 and the industrial mobile control computer 6. Without being limited thereto, since in a practical EMS delivery system waveguide communication may also be used between the master controller 2 (and if necessary the static safety logic controller) and the spreader, it is also possible to replace part of the network cable connections in the laboratory bench with micro waveguide slots and corresponding adapters.

Preferably, the at least one motor 5 is connected to the drive frequency converter 4 via a power line.

Such a test bench 1 enables a distributed control arrangement in an EMS transmission system of a vehicle assembly line to be efficiently restored, creates an organic operating environment for the individual controllers, enables the individual controllers to interact with one another, i.e. exchange signals and data between one another, and enables the control functions of the controllers to be carried out at least in part. The laboratory bench 1 is thus able to test the different controllers involved in an EMS delivery system without disengaging the EMS delivery system and its spreader. In the experiment table 1, each component does not participate in the actual operation of the EMS conveying system and the lifting appliance thereof, but the offline or offline test of each controller in the EMS conveying system is realized, so that the potential safety risk is avoided, the production safety is ensured, and the actual vehicle production is not influenced. The experiment table 1 can not only test the controller, but also simulate the fault, and can be used as a training facility for maintenance personnel of the EMS conveying system.

Fig. 2 is a schematic block diagram of another embodiment of a test bench for a vehicle assembly line EMS delivery system according to the present invention, in which the connections of the various components in the test bench to each other are shown.

The test stand 1' shown in fig. 2 differs from the test stand 1 shown in fig. 1 in that: the test bench 1 'shown in fig. 2 is provided with both a static safety logic controller 3' and a dynamic safety logic controller 8 in terms of safety logic controllers. The static safety logic controller 3' is here in particular a fixedly arranged safety logic controller, while the dynamic safety logic controller 8 is a safety logic controller arranged on the spreader and moving with the spreader. In a practically operating EMS transportation system, the static safety logic controller 3' can communicate with a plurality of dynamic safety logic controllers 8 and even with the dynamic safety logic controllers 8 on all spreaders, controlling the safety speed and/or safety braking and/or safety limiting function of a plurality or all spreaders as a whole. The dynamic safety logic controller 8 may receive the upper safety signal from the static safety logic controller 3' and may be able to acquire sensor signals of sensors on the individual spreaders to achieve a safe speed and/or a safe braking and/or a safe limiting function for the individual spreaders.

Furthermore, the test bench 1 'shown in fig. 2 is provided with not only the lifting drive frequency converter 4' but also the walking drive frequency converter 9 in terms of the drive frequency converter. Since the lifting motor has a greater safety significance than the travel motor during operation of the EMS delivery system, in the case shown in fig. 2, the lifting motor 5 'is connected to the lifting drive frequency converter 4', whereas the travel motor is not assigned to the travel drive frequency converter 9. The lifting driving frequency converter 4 'outputs alternating current voltage with variable amplitude and/or frequency to the lifting motor 5' through a power line, thereby controlling the lifting operation and the lifting speed of the lifting appliance.

Fig. 3 shows a schematic block diagram of a further embodiment of a laboratory bench for an EMS delivery system of a vehicle assembly line according to the utility model, in which the connections of the individual components in the laboratory bench to one another are shown. The test bench 1 ″ shown in fig. 3 is additionally provided with respect to the test bench 1' shown in fig. 2: a walking motor 10, a reading head 11 of the linear positioning device and an operating handle 12.

The walking motor 10 is connected to the walking drive frequency converter 9 through a power line. The walking driving frequency converter 9 outputs alternating current voltage with variable amplitude and/or frequency to the walking motor 10, thereby controlling the walking operation and the walking speed of the lifting appliance.

It is also possible that, as the lifting drive frequency converter 4 'may be used as an upper computer for the walking drive frequency converter 9, a bus communication cable, such as a CAN bus communication cable, may also be provided between the lifting drive frequency converter 4' and the walking drive frequency converter 9.

The linear positioning device for determining the lateral position of the spreader comprises a reader head 11 and a code strip, not shown, said reader head 11 being communicatively connected to the dynamic safety logic controller 8, for example by means of an RS485 communication cable. Here, the position of the reader head 11 on the entire code strip is determined by the reader head 11 reading a two-dimensional code or a bar code on the code strip, and then the position of the spreader in the EMS transportation system.

Furthermore, an operating handle 12 for manually controlling the hoist motor and/or the travel motor may be connected to the hoist drive frequency converter 4', so that operations such as connection of the operating handle 12, switching of the manual mode, manipulation of the hoist travel and/or lift, exiting of the manual mode, and the like may be performed without safety risk. The operating handle 12 is connected with the lifting drive frequency converter 4' in a communication way, such as through an RS485 communication cable.

It is also preferred that a pull rope encoder is mounted on the elevator motor 5' for measuring the stroke of the elevator motor, said pull rope encoder being in signal connection with the dynamic safety logic controller 8 in fig. 2 or 3.

Fig. 4 shows a schematic power supply manner of the experiment table for the vehicle assembly line EMS delivery system according to the present invention. The possible supply of current in accordance with the utility model is shown here by way of example in fig. 2 by way of an example of a test stand 1' according to the second exemplary embodiment described above.

The laboratory table 1 'as shown in fig. 4 comprises a power supply device 13, and the power supply device 13 can supply 380V ac power to at least the lifting drive frequency converter 4' and the walking drive frequency converter 9. The lifting drive frequency converter 4 'can generate and output an alternating voltage with variable amplitude and/or frequency to the lifting motor 5' on the basis of a constant alternating voltage based on control logic and/or control signals, thereby controlling the lifting operation and the lifting speed of the lifting appliance.

The ac-dc converter 14 in the power supply 13 can convert 380V ac into 24V dc to provide 24V dc to the general controller 2, the static safety logic controller 3', the industrial mobile industrial personal computer 6, the routing hub 7, the dynamic safety logic controller 8.

To enhance the safety of electricity, 380V three-phase ac power from the outside is first passed through the safety interlock circuit 15. The safety interlock circuit is illustrated in more detail in FIG. 5.

Fig. 5 shows a schematic circuit diagram of a safety interlock circuit associated with the power supply device. The safety interlock circuit 15 is provided with an emergency stop switch SB1 and a dual-contact relay operated by the emergency stop switch SB 1. The double-contact relay comprises a first contactor KM1 and a second contactor KM2 in order to prevent contact adhesion and prevent safe disconnection.

The 380V main loop of the safety interlock circuit is shown on the left side of fig. 5, and the 24V control loop of the safety interlock circuit is shown on the right side. The first contactor KM1 and the second contactor KM2, which are operated by the same emergency stop switch SB1, are used to disconnect the respective phase lines L1, L2, L3 of 380V in case of emergency. The purpose of the dual-path redundancy design using the two contactors is to prevent one of the two contactors from being stuck on a contact point, so that the power supply of the experiment table cannot be safely cut off, thereby ensuring the power utilization safety and enabling the experiment table to meet the safety level of 3 specified in EN 954-1.

The emergency stop switch SB1, which is located in the control circuit as shown in fig. 5, is constructed as a normally closed switch. In normal operation, the emergency stop switch SB1 is closed, and the first contactor KM1 and the second contactor KM2 are energized, so that the first contactor KM1 and the second contactor KM2, which are configured as normally open contacts, are closed. In case of emergency, the maintenance personnel can immediately press the emergency stop switch SB1 to cause the emergency stop switch SB1 to disconnect the 24V loop, and then the first contactor KM1 and the second contactor KM2 lose power, so that the first contactor KM1 and the second contactor KM2 which are normally open contacts effectively cut off the power supply of the 380V main loop, and thus, all components of the experiment table are stopped.

In addition, in order to further guarantee the electrical safety, the metal housing of each component in the laboratory bench is preferably equipped with a safety grounding wire.

Fig. 6 shows a schematic arrangement of a laboratory bench for a vehicle assembly line EMS delivery system according to the present invention. Here, for the sake of brevity, communication connections and power supply connections between the various components in the laboratory bench are not shown in fig. 6. Reference may be made to the detailed description of the embodiments above with respect to the communication connections and power supply connections of the various components.

As shown in fig. 6, each component in the bench of the vehicle assembly line EMS delivery system is mounted on a rack 16. The housing 16 comprises a table 17 for the industrial mobile process control computer 6 to be positioned in order to facilitate the inspection and handling by maintenance personnel. And a power supply device 13 comprising an alternating current-direct current converter 14, a master controller 2, a routing concentrator 7, a linear positioning device comprising a reading head 11 and a code strip 18, a static safety logic controller 3' and a dynamic safety logic controller 8 are arranged above the table board 17 in a wall-mounted manner. A lifting driving frequency converter 4' and a walking driving frequency converter 9 are also arranged below the table top 17 in a wall-mounted manner. The lifting motor 5 'connected to the lifting drive frequency converter 4' is placed under the table-board 17.

As can be seen from fig. 6, the laboratory bench according to the utility model is able to integrate the control layout in the vehicle assembly line EMS delivery system in a compact, compact and easy to operate manner. Such an arrangement of the test bench according to the utility model facilitates the operation of maintenance personnel, in particular the wiring, observation and demonstration, whether for testing controller spare parts, fault simulation or training teaching.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Claims (12)

1. A laboratory bench for a vehicle assembly line EMS delivery system, the laboratory bench comprising:

the master controller is used for the EMS conveying system;

a safety controller;

a drive frequency converter for the spreader;

at least one motor for the spreader;

an industrial mobile industrial personal computer; and

a routing hub;

the master controller, the safety controller, the driving frequency converter and the industrial mobile industrial personal computer are in communication connection through the routing concentrator, and the at least one motor is connected to the driving frequency converter.

2. The laboratory bench of claim 1 wherein said safety controller comprises a static safety logic controller and a dynamic safety logic controller.

3. A laboratory bench according to claim 1 or 2, wherein said drive frequency converter for the spreader comprises a walking drive frequency converter and a lifting drive frequency converter.

4. Laboratory table according to claim 3, characterized in that the at least one motor comprises a travel motor and/or a lifting motor, wherein the travel motor is connected to a travel drive frequency converter and the lifting motor is connected to a lifting drive frequency converter.

5. Laboratory table according to claim 4, characterized in that at least one pull-cord encoder is mounted on the lifting motor for measuring the stroke of the lifting motor, said pull-cord encoder being in signal connection with the safety controller.

6. Laboratory table according to claim 1 or 2, characterized in that it comprises an operating handle which is connected to a drive frequency converter.

7. Laboratory table according to claim 1 or 2, characterized in that the laboratory table comprises a linear positioning device comprising a read head and a code strip, the read head of the linear positioning device being communicatively connected to the safety controller.

8. Laboratory table according to claim 1 or 2, characterized in that it comprises a power supply device which supplies 380V ac to the drive frequency converter and 24V dc at least to the general controller, the safety controller, the routing hub and the industrial mobile industrial control computer by means of an ac-dc converter.

9. A laboratory bench according to claim 8 wherein said power supply unit is provided with a safety interlock circuit in which an emergency stop switch and a dual contact relay operated by said emergency stop switch are provided.

10. The laboratory bench of claim 8 wherein the metal housing of each component in said laboratory bench is fitted with a safety ground lead.

11. A laboratory bench according to claim 1 or 2, characterized in that a sensor junction box is connected to said safety controller, said sensor junction box collecting sensor signals of at least one of a belt breakage sensor, an overload sensor, a road wheel speed feedback sensor, a zero position detection sensor, a motor rotation sensor.

12. Laboratory table according to claim 1 or 2, characterized in that it comprises a rack on which the safety controller, the drive frequency converter and the routing hub are arranged wall-mounted.

Images