An upper computer monitoring and control system based on cement unloading and conveying

Abstract

The present invention discloses a host computer monitoring and control system based on cement ship unloader transportation, including current transformer, eight-way collector, slave station PLC, master station PLC, ship unloader PLC, switch and host computer. The host computer establishes Ethernet communication between the master station PLC and the ship unloader PLC through the switch, and remotely transmits data of corresponding addresses in the master station PLC and the ship unloader PLC to the host computer program, and the simulated current is converted into actual current in the host computer program; the switch quantity and current quantity of each device are displayed in real time in the host computer program, and when the current quantity of the device reaches overload, a window alarm is issued, and the overloaded device and pop-up window are automatically closed after a period of time, and the device can also be manually switched in the host computer program. The present invention can achieve the purpose of improving the safety and reliability of the cement transportation system by real-time monitoring and alarming of switches and currents of devices except those with only tiny currents.

Description

Technical Field

[0001] The present invention belongs to the technical field of host computer control, and particularly relates to a host computer monitoring and control system based on cement ship unloading and conveying. Background Art

[0002] The current cement ship unloading and conveying system is mainly a system that directly controls the operation of equipment. It can only manually operate the button switches on the distribution box to start and stop the normal operation of the equipment, and all operations are based on people's experience judgment. It is impossible to make timely prevention for emergencies such as equipment overload.

[0003] The existence of the host computer provides a feasible idea for solving the problem. The host computer refers to a computer that can directly issue operation commands. The instructions issued by the host computer can control the switch quantities at corresponding positions of the PLC, and the PLC then interprets this command into corresponding timing signals to directly control the corresponding equipment. Summary of the Invention

[0004] To solve the above technical problems existing in the cement ship unloading and conveying system, the present invention provides a host computer monitoring and control system based on cement ship unloading and conveying. The present invention uses a host computer and related equipment to form a monitoring system for current and switches, and has the functions of alarming and automatically shutting down equipment. The control switches of equipment with potential safety hazards in remote manual control are also displayed in the equipped application program.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A host computer monitoring and control system based on cement ship unloader conveying, characterized by comprising:

[0007] Current transformers, which collect the current quantities of the cement ship unloader equipment and the conveying equipment, and transmit the collected current quantities to an eight-channel collector;

[0008] An eight-channel collector, which is signal-connected to the current transformers, receives the current quantities collected by the current transformers and exists in the form of current analog quantities;

[0009] Slave station PLC, which collects the conveying switch quantities of the conveying equipment;

[0010] Master station PLC, which is signal-connected to the eight-channel collector or signal-connected to the slave station PLC; when signal-connected to the eight-channel collector, stores the current analog quantities in different addresses of the master station PLC; when signal-connected to the slave station PLC, establishes a master-slave communication relationship, reads and stores the switch quantity data of the slave station PLC, and reduces the modification of the PLC program of the original cement station equipment;

[0011] Ship unloader PLC, which collects and stores the ship unloader switch quantities of the cement ship unloader equipment;

[0012] A switch, which is respectively connected to the main station PLC and the ship unloader PLC in terms of signals;

[0013] A host computer, through the switch, enables the main station PLC and the ship unloader PLC to establish Ethernet communication with the host computer, remotely transmits the data at the corresponding addresses in the main station PLC and the ship unloader PLC to the host computer program, and converts the analog current value into the actual current value in the host computer program; the switch quantities and current values of each device are displayed in real time in the host computer program. When the current value of a device reaches overload, a window alarm is given, and after a period of time, the overloaded device and the pop-up window are automatically closed. Also, the device can be manually controlled to be switched on or off in the host computer program.

[0014] Furthermore, the current value data collected by the current transformer is an analog current value, and the analog current value is converted into the actual current value by a program in the host computer.

[0015] Furthermore, since the current magnitudes of the on-site ship unloader equipment and conveying equipment are different, current transformers with different ranges need to be used, and the conversion formula for reading the corresponding current needs to be modified in the host computer program.

[0016] Furthermore, at most eight current transformers can be connected to one eight-channel collector, that is, the upper limit of the data collection volume of one eight-channel collector is 8 groups.

[0017] Furthermore, a series of criteria for judging whether the current is overloaded can be modified, and the series of criteria includes the time and the threshold of current overload.

[0018] Furthermore, one main station PLC or ship unloader PLC can be connected to multiple eight-channel collectors, that is, the single PLC can store multiple groups of current values, and the eight data collected by each eight-channel collector correspond to one address and are stored in sequence to distinguish the source of the current and increase the quantity of monitored data.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: Since the host computer is built on the system of cement ship unloading and conveying that is already operating normally, by using the monitoring and control system of the present invention, while not affecting the normal operation of the original on-site equipment, a current monitoring device can be installed, including a current transformer and an eight-channel collector, and supplemented by a brand-new PLC device and the host computer, the expected purpose can be achieved, ensuring the timeliness and accuracy of the production operation of the original system of cement ship unloading and transportation, and preventing the occurrence of potential accident hazards. Description of the Drawings

[0020] Figure 1 It is the control flow block diagram of the present invention. Detailed Embodiment

[0021] The following will describe in detail the specific implementation manners of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention.

[0022] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0024] Referring to Figure 1 , a host computer monitoring and control system based on the conveying of a cement unloader of the present invention includes:

[0025] Current transformers, which collect the current amounts of the cement unloader equipment and the conveying equipment, and convey the collected current amounts to an eight-channel collector;

[0026] Eight-channel collector, which is signal-connected to the current transformers, receives the current amounts collected from the current transformers and exists in the form of current analog quantities;

[0027] Slave station PLC, which collects the conveying switch quantities of the conveying equipment;

[0028] Master station PLC, which is signal-connected to the eight-channel collector or signal-connected to the slave station PLC; when signal-connected to the eight-channel collector, stores the current analog quantities in different addresses of the master station PLC; when signal-connected to the slave station PLC, establishes a master-slave communication relationship, reads and stores the switch quantity data of the slave station PLC, and reduces the modification of the PLC program of the original cement station equipment;

[0029] Unloader PLC, which collects and stores the unloader switch quantities of the cement unloader equipment;

[0030] Switch, which is respectively signal-connected to the master station PLC and the unloader PLC;

[0031] Host computer, through the switch, establishes an Ethernet communication between the master station PLC and the unloader PLC and the host computer, remotely transmits the data in the corresponding addresses in the master station PLC and the unloader PLC to the host computer program, and the analog current amount is converted into an actual current in the host computer program; the switch quantities and current amounts of each device are displayed in real time in the host computer program, when the current amount of the device reaches overload, a window alarm is carried out, and after a period of time, the overloaded device and the pop-up window are automatically closed, and the device can also be switched on and off manually in the host computer program.

[0032] In one embodiment, the current amount data collected by the current transformers is an analog current amount, and the analog current amount is converted into an actual current amount by a program in the host computer.

[0033] In one embodiment, since the currents of the on-site ship unloader equipment and the conveying equipment are different in magnitude, current transformers with different ranges need to be used, and the conversion formula corresponding to the current reading needs to be modified in the host computer program.

[0034] In one embodiment, one eight-channel collector is connected to at most eight current transformers, that is, the upper limit of the amount of collected data of one eight-channel collector is 8 groups.

[0035] In one embodiment, a series of criteria for determining whether a current is overloaded may be modified, the series of criteria including time and a threshold value of current overload.

[0036] In one embodiment, a master station PLC or a ship unloader PLC can be connected to multiple eight-way collectors, that is, a single PLC can store multiple groups of current values, and the eight data collected by each eight-way collector correspond to an address and are stored in sequence to distinguish the source of the current and increase the amount of monitoring data.

[0037] The working mode of the present invention is as follows:

[0038] The host computer and the main station PLC, as well as the host computer and the ship unloader PLC are connected via industrial switch Ethernet. This link is used to achieve a) one host computer can be connected to multiple PLC devices. By setting different IP addresses between PLC devices, the IP address is modified in the monitoring and control system of the host computer, and the switch quantity and current quantity in different PLC devices are read one by one; b) when the connection between the host computer and the PLC is temporarily disconnected due to environmental reasons, the connection with the PLC can be re-established through the button of the host computer program, and the device status can be refreshed to check whether the monitoring and control system has any faults.

[0039] The master-slave communication relies on the function code of the PLC itself and uses a special master-slave communication code. Currently, it has been tested that the master-slave communication function can be realized, that is, the switch quantity read from the slave PLC is read and written to the relative position with the master station. This is the key to prevent major changes in the original on-site program.

[0040] The present invention is a set of monitoring and control systems independently established on site, which quickly establishes a remote monitoring and control channel between the host computer and the on-site equipment. The use of the host computer monitoring and control system for cement unloading and transportation can provide early warning when equipment fails and prevent dangerous accidents from happening, which is an automated protection mechanism for cement plants.

[0041] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An upper computer monitoring and control system based on the conveying of a cement unloader, characterized in that, it includes: Current transformers, which collect the current of the cement unloader equipment and the conveying equipment, and convey the collected current to an eight-channel collector; The eight-channel collector is signal-connected to the current transformers, receives the current collected from the current transformers and exists in the form of current analog quantity; Slave station PLC, which collects the conveying switch quantity of the conveying equipment; Master station PLC, which is signal-connected to the eight-channel collector or signal-connected to the slave station PLC; when signal-connected to the eight-channel collector, stores the current analog quantity in different addresses of the master station PLC; When signal-connected to the slave station PLC, establishes a master-slave communication relationship, reads and stores the switch quantity data of the slave station PLC, reducing the modification of the original cement station equipment PLC program; Unloader PLC, which collects and stores the unloader switch quantity of the cement unloader equipment; Switch, which is respectively signal-connected to the master station PLC and the unloader PLC; Upper computer, through the switch, establishes an Ethernet communication between the master station PLC and the unloader PLC and the upper computer, remotely transmits the data of the corresponding addresses in the master station PLC and the unloader PLC to the upper computer program, and the analog current quantity is converted into the actual current in the upper computer program; the switch quantity and current quantity of each device are displayed in real time in the upper computer program, when the current of the device reaches overload, a window alarm is carried out, and after a period of time, the overloaded device and the pop-up window are automatically closed, and the device can also be manually controlled to switch on and off in the upper computer program.

2. An upper computer monitoring and control system based on the conveying of a cement unloader as described in claim 1, characterized in that, The current quantity data collected by the current transformers is analog current quantity, and the analog current quantity is converted into the actual current quantity by a program in the upper computer.

3. An upper computer monitoring and control system based on the conveying of a cement unloader as described in claim 1, characterized in that, Due to the different current magnitudes of the on-site unloader equipment and the conveying equipment, current transformers with different ranges need to be used, and the conversion formula for reading the corresponding current needs to be modified in the upper computer program.

4. An upper computer monitoring and control system based on the conveying of a cement unloader as described in claim 1, characterized in that, One eight-channel collector is connected to at most eight current transformers, that is, the upper limit of the collected data volume of one eight-channel collector is 8 groups.

5. An upper computer monitoring and control system based on the conveying of a cement unloader as described in claim 1, characterized in that, A series of criteria for judging whether the current is overloaded can be modified, and the series of criteria includes the time and the threshold of current overload.

6. An upper computer monitoring and control system based on the conveying of a cement unloader as described in any one of claims 1 to 5, characterized in that, One master station PLC or unloader PLC can be connected to multiple eight-channel collectors, that is, the single PLC can store multiple groups of current values, and the eight data collected by each eight-channel collector correspond to one address and are stored in sequence to distinguish the source of the current and increase the quantity of monitored data.

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