CN110002184B - Transmission failure detection system, transmission failure detection method, and transmission system - Google Patents
Transmission failure detection system, transmission failure detection method, and transmission system Download PDFInfo
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- CN110002184B CN110002184B CN201910275035.9A CN201910275035A CN110002184B CN 110002184 B CN110002184 B CN 110002184B CN 201910275035 A CN201910275035 A CN 201910275035A CN 110002184 B CN110002184 B CN 110002184B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a transmission fault detection system, a transmission fault detection method and a transmission system, wherein the transmission fault detection system comprises a PLC control unit and a communication unit, wherein the PLC control unit is connected with a plurality of frequency converters through the communication unit and is used for detecting output signal values of the frequency converters during operation; the PLC control unit is set to compare the output signal values of the plurality of frequency converters with the reference value stored by the PLC control unit so as to judge whether the transmission process of irradiation processing has faults or not; the plurality of frequency converters are used for adjusting the running states of the plurality of motors, and the plurality of motors are used for driving the plurality of rolling rods to rotate so as to drive the plurality of trays bearing the objects to be irradiated to move along the transmission channel.
Description
Technical Field
The embodiment of the invention relates to the field of irradiation processing, in particular to a transmission fault detection system, a transmission fault detection method and a transmission system.
Background
The irradiation processing is a process of irradiating an object to be processed with high-energy rays generated by an electron accelerator or a radionuclide to generate a series of biological, chemical and physical effects, thereby improving the quality or performance of the object. The irradiation processing mainly carries out disinfection, sterilization, material modification and the like on substances, has the characteristics of strong penetrating power, no pollution, no residue, simple flow and easy control, and is called as 'green cold processing'.
In the existing irradiation processing production process, an object to be irradiated is usually placed on a tray of a transmission channel, a frequency converter is used for driving a motor to drive a rolling rod on the transmission channel to rotate, and the tray is driven to move on the transmission channel by virtue of friction force between the rolling rod and the tray. Due to the requirement of ray shielding, a plurality of turning sections are required to be arranged after the transmission channel enters the shielding hall, so that the fault of a chuck easily occurs in the transmission process of the tray, and the tray is blocked on the transmission channel and cannot move forward. Once the chuck is engaged, it requires a shutdown to process, which can affect production.
The prior art generally utilizes position sensors or video surveillance to determine transmission failures. However, since the region where the transmission channel passes is an irradiation region, the position sensor is extremely susceptible to damage by strong rays, and thus is inconvenient to use in the field of irradiation processing; the video monitoring mode requires an operator to judge faults according to videos, the problems of missed judgment or untimely response are inevitable when the operators observe and judge the faults manually, and the fault detection effect is poor.
Disclosure of Invention
The present invention is directed to a transmission failure detection system, a transmission failure detection method, and a transmission system, so as to solve at least one of the above technical problems.
According to one aspect of the invention, a transmission fault detection system is provided, which comprises a PLC control unit and a communication unit, wherein the PLC control unit is connected with a plurality of frequency converters through the communication unit, and is used for detecting output signal values of the frequency converters during operation; the PLC control unit is set to compare the output signal values of the plurality of frequency converters with the reference value stored by the PLC control unit so as to judge whether the transmission process of irradiation processing has faults or not; the plurality of frequency converters are used for adjusting the running states of the plurality of motors, and the plurality of motors are used for driving the plurality of rolling rods to rotate so as to drive the plurality of trays bearing the objects to be irradiated to move along the transmission channel.
According to some embodiments, the output signal value is an output current value, and when the output current value is greater than the reference value, the PLC control unit determines that a fault exists in the transmission process of the irradiation processing.
According to some embodiments, the fault comprises: at least one of the plurality of trays is blocked at the transport passage.
According to some embodiments, the plurality of motors have numbers, and the PLC control unit is configured to determine that a jam has occurred at a tray driven by a motor of a particular number.
According to some embodiments, the irradiation source further comprises an upper monitoring unit, wherein the upper monitoring unit is connected with the PLC control unit through the communication unit, and is configured to receive a determination result of the PLC control unit and disconnect a power supply of the irradiation source according to the determination result.
According to another aspect of the present invention, a transmission failure detection method is provided, including: detecting output signal values of a plurality of frequency converters in operation by using a PLC control unit; comparing the output signal values of the plurality of frequency converters with the reference value stored by the PLC control unit by utilizing the PLC control unit so as to judge whether the transmission process of irradiation processing has faults or not; the plurality of frequency converters are used for adjusting the running states of the plurality of motors, and the plurality of motors are used for driving the plurality of rolling rods to rotate so as to drive the plurality of trays bearing the objects to be irradiated to move along the transmission channel.
According to some embodiments, the output signal value is an output current value, and when the output current value is greater than the reference value, the PLC control unit determines that a fault exists in the transmission process of the irradiation processing.
According to some embodiments, the fault comprises: at least one of the plurality of trays is blocked at the transport passage.
According to some embodiments, the plurality of motors have numbers, the method further comprising: and judging the tray driven by the motor with the specific number to be blocked by using the PLC control unit.
According to some embodiments, further comprising: and receiving the judgment result of the PLC control unit by using an upper monitoring unit, and disconnecting the power supply of the irradiation source according to the judgment result.
According to some embodiments, further comprising: after the irradiation source is powered off, the fault is manually processed, or a fault processing unit is started to automatically process the fault.
According to some embodiments, further comprising: and detecting normal output signal values of the plurality of frequency converters when the transmission process is normal by using a PLC control unit as reference values, and storing the reference values.
According to another aspect of the present invention, a transmission system is provided, the transmission system comprising the transmission failure detection system, wherein the transmission system comprises: a transmission channel comprising a plurality of straight segments and a plurality of turnaround segments; the rolling bars are arranged on the transmission channel; a plurality of motors configured to drive the plurality of rollers to rotate; a plurality of frequency converters configured to adjust operating states of the plurality of motors; and a plurality of trays arranged to carry the object to be irradiated; wherein, a plurality of rollers drive a plurality of trays move along transmission path.
In the transmission fault detection system according to the embodiment of the invention, the output signal value of the frequency converter for adjusting the running state of the motor can be detected by arranging the PLC control unit and the communication unit, and whether a fault exists in the transmission process of irradiation processing can be judged by comparing the output signal value with the reference value, so that the influence of strong rays in an irradiation area on a detection instrument can be avoided, meanwhile, the automation and the mechanization of transmission fault detection can be realized, the advantages of accuracy, high efficiency and real time are achieved, and the problems of missed judgment or untimely reaction caused by manual detection are avoided.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
FIG. 1 shows a schematic diagram of a transport fault detection system for irradiation processing according to an exemplary embodiment of the present invention;
FIG. 2 shows a schematic diagram of the transmission channels involved in the detection system of FIG. 1; and
fig. 3 shows a flow chart of a transport fault detection method for irradiation processing according to an exemplary embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
Fig. 1 shows a schematic view of a transport fault detection system 100 for irradiation processing according to an exemplary embodiment of the present invention, and fig. 2 shows a schematic view of a transport channel 20 involved in the detection system 100 of fig. 1. As shown in fig. 1-2, the detection system 100 includes a PLC control unit 2 and a communication unit 3, wherein the PLC control unit 2 is connected to a plurality of frequency converters 4 through the communication unit 3, and is configured to detect output signal values of the plurality of frequency converters 4 during operation; the PLC control unit 2 is also used for comparing the output signal values of the plurality of frequency converters 4 with the reference value stored in the PLC control unit 2 so as to judge whether the transmission process of irradiation processing has faults or not; wherein, the plurality of frequency converters 4 are used for adjusting the operation state of the plurality of motors 5, and the plurality of motors 5 are used for driving the plurality of rollers to rotate so as to drive the plurality of trays 8 carrying the objects to be irradiated to move along the transmission channel 20. In the transmission fault detection system 100 for irradiation processing according to the embodiment of the present invention, by setting the PLC control unit 2 and the communication unit 3, the output signal value of the frequency converter 4 for adjusting the operation state of the motor 5 can be detected, and whether a fault exists in the transmission process of irradiation processing can be determined by comparing the output signal value with a reference value, so that the influence of the strong ray in the irradiation region on the detection instrument can be avoided, and meanwhile, the automation and the mechanization of transmission fault detection can be realized.
The apparatus for irradiation processing generally includes an irradiation chamber provided with an irradiation source, and a plurality of trays 8 for carrying an object to be irradiated are irradiated with high-energy rays in the irradiation chamber to complete processing of a product. And shielding halls are arranged around the irradiation chamber and used for isolating the influence of high-energy rays on the external environment. The transfer channel 20 extends from the outside through the entrance into the screening hall and all the way to the irradiation room, and then from the irradiation room to the exit of the screening hall and from the exit to the outside. The loading and unloading of the object to be irradiated can be carried out outside the shielding hall, so that the personnel for loading and unloading are not influenced by radiation. As indicated by the hollow arrows in fig. 2, the irradiation objects are loaded on a plurality of trays 8 and move all the way along the transfer path 20. To attenuate the radiation dose of the high-energy rays, the transmission channel 20 may be provided in the form of a "labyrinth" comprising a plurality of straight segments 7 and a plurality of turn segments 6, which meander. The plurality of straight line segments 7 and the plurality of turning segments 6 are connected at intervals, and the plurality of turning segments 6 can be 90-degree turning segments.
The transfer passage 20 is provided with a plurality of rollers which rotate in the same direction side by side. The plurality of trays 8 are arranged on the plurality of rolling bars, and under the action of friction force between the plurality of rolling bars and the plurality of trays 8, the plurality of trays 8 can move along the transmission channel 20, so that the rotation of the plurality of rolling bars is converted into the movement of the plurality of trays 8.
The rolling bars of each or two of the straight sections 7 and the turning sections 6 of the transmission channel 20 can be driven by one motor 5 to rotate simultaneously, and the driving state of each motor 5 can be realized by the output regulation of the corresponding frequency converter 4. Therefore, the whole conveying channel 20 can be driven by 10 or more frequency converters 4 to rotate the corresponding motors 5, so as to drive the rollers of the corresponding sections to rotate, so as to drive the plurality of trays 8 to move on the conveying channel 20.
Because the conveying channel 20 is provided with the plurality of turning sections 6, the movement of the plurality of trays 8 is susceptible to being influenced and breaking down at the plurality of turning sections 6, so that at least one of the plurality of trays 8 is blocked in the conveying channel 20 and cannot move forward, and the subsequent conveying process is influenced. Therefore, during the irradiation processing production process, it is necessary to timely troubleshoot such failures and to deal with them so as not to hinder the production. When a specific tray 8 is jammed in the transfer passage 20, the frictional force between the specific tray 8 and the rollers increases, and thus if a sudden increase in the frictional force between the rollers and the tray 8 of a certain section can be detected, it can be determined that a chuck failure has occurred in the section. The friction between the roller and the tray 8 increases, so that the output torque of the motor 5 driving the roller increases accordingly, and the output signal value of the corresponding frequency converter 4 changes accordingly. It is thus possible to determine whether there is a fault in the transmission process by comparing the value of the output signal of the frequency converter 4 with a reference value. The reference value is the normal output signal value of the frequency converter 4 when the transmission process is normally performed. In the embodiment of the present invention, the output signal value may be an output current value, an increase in the output torque of the motor 5 may increase the output current value of the frequency converter 4, and when the output current value is greater than the reference value, the PLC control unit 2 determines that a fault exists in the transmission process of the irradiation processing. The corresponding reference value is the normal output current value of the frequency converter 4 when the transmission process is normally performed.
The PLC control unit 2 of the invention can comprise a Programmable Logic Controller (PLC), the PLC is specially designed for application in industrial environment, adopts a programmable memory, is an industrial control computer in a standard sense, and has the advantages of strong anti-interference capability, convenient maintenance, low energy consumption and the like. The communication unit 3 of the present invention may be a communication cable, and particularly, the communication unit 3 for connecting the PLC control unit 2 and the plurality of frequency converters 4 may include RS485 communication.
In an embodiment of the present invention, the plurality of motors 5 may have numbers, and the PLC control unit 2 is configured to determine that a jam has occurred at the tray 8 driven by the motor 5 of a particular number. The PLC control unit 2 can collect the output current values of the motors 5 corresponding to the numbers in real time, the output current values are compared with the normal output current values (namely reference values) of the motors 5 corresponding to the numbers stored in the PLC control unit 2 one by one, when the output current value of the specific motor 5 is larger than the reference value, the blockage of the tray 8 driven by the rolling rod driven by the specific motor 5 can be judged, the chuck fault in the transmission process can be timely and effectively known, the position of the fault can be accurately positioned, the fault can be conveniently and rapidly processed in the follow-up process, and the fault is prevented from delaying the production process for a long time.
With continued reference to fig. 1, the transmission failure detection system 100 for irradiation processing according to the present invention may further include an upper monitoring unit 1, where the upper monitoring unit 1 is connected to the PLC control unit 2 through a communication unit 3, and is configured to receive the determination result of the PLC control unit 2 and disconnect the power supply of the irradiation source according to the determination result. The supervisory control unit 1 may comprise a computer or other control device for controlling the irradiation source. The irradiation source may include an electron accelerator, a cobalt source, and the like. The judgment result of the PLC control unit 2 may include that there is a failure in the irradiation processing transmission process, or may include that a failure occurs at a specific section of the transmission channel 20. The communication unit 3 may be a communication cable. When the upper monitoring unit 1 receives a signal that a fault exists in the transmission process from the PLC control unit 2, the power supply of the irradiation source can be timely disconnected, the high voltage of the irradiation source is automatically closed, and irradiation processing is stopped; thereafter, the fault may be handled manually, or the fault handling unit may be started by the upper monitoring unit 1 to automatically handle the fault, preventing excessive irradiation. After the upper monitoring unit 1 receives a signal that a fault exists at a specific position of the transmission channel 20 from the PLC control unit 2, the upper monitoring unit 1 can display or play the fault position, so that an operator can conveniently and quickly arrive at the fault position for processing; or the upper monitoring unit 1 can send the fault position to the fault processing unit, and the fault processing unit accurately and rapidly processes the fault according to the position information, so that irradiation processing production can be rapidly recovered, and delay is avoided.
Fig. 3 shows a flowchart of a transmission failure detection method for irradiation processing according to an exemplary embodiment of the present invention, and as shown in fig. 3, the detection method may include:
s1, detecting the output signal values of the plurality of frequency converters 4 in operation by the PLC control unit 2; and
s2, comparing the output signal values of the plurality of frequency converters 4 with the reference value stored by the PLC control unit 2 by using the PLC control unit 2 to judge whether the transmission process of irradiation processing has faults or not;
wherein, the plurality of frequency converters 4 are used for adjusting the operation state of the plurality of motors 5, and the plurality of motors 5 are used for driving the plurality of rollers to rotate so as to drive the plurality of trays 8 carrying the objects to be irradiated to move along the transmission channel 20.
The transmission channel 20 may include a plurality of straight segments and a plurality of turn segments. The output signal value can be an output current value, and when the output current value is larger than the reference value, the PLC control unit judges that a fault exists in the transmission process of irradiation processing. The fault may include: at least one of the plurality of trays 8 is blocked at the transfer passage 20. The plurality of motors 5 may have a number, the method may further comprise: the PLC control unit 2 is used for judging that the tray 8 driven by the motor 5 with the specific number is blocked.
The method may further comprise: and receiving the judgment result of the PLC control unit 2 by using the upper monitoring unit 1, and disconnecting the power supply of the irradiation source according to the judgment result. The method may further comprise: after the irradiation source is powered off, the fault is manually processed, or a fault processing unit is started to automatically process the fault. The method may further comprise: and detecting normal output signal values of the plurality of frequency converters 4 when the transmission process is normal by using the PLC control unit 2 as reference values, and storing the reference values.
According to another aspect of the present invention, a transmission system is proposed, which may comprise a transmission failure detection system 100, wherein the transmission system comprises: a transfer channel 20, the transfer channel 20 may include a plurality of straight segments and a plurality of turn segments; a plurality of rollers provided on the transfer passage 20; a plurality of motors 5 configured to drive the plurality of rollers to rotate; a plurality of frequency converters 4 configured to adjust the operating states of the plurality of motors 5; and a plurality of trays 8 arranged to carry the objects to be irradiated; wherein the rollers drive the trays 8 to move along the transfer passage 20.
The transmission fault detection system and method for irradiation processing at least have the following technical effects:
(1) the irradiation processing transmission process can be monitored in real time, if the transmission process fails, the irradiation processing transmission process can be quickly, timely and accurately known, the failure is prevented from causing too much delay to the production process, and the production efficiency is favorably improved;
(2) the specific position of the fault in the transmission process can be obtained, the fault position does not need to be checked, and the fault can be conveniently and rapidly processed in place by an operator or a fault processing unit in the follow-up process;
(3) the damage of the position sensor caused by strong rays due to fault detection by the position sensor is avoided;
(4) the automatic detection of transmission faults is realized, the manpower can be saved, and the problems of missed judgment or untimely reaction caused by manual detection can be avoided.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of embodiments of the invention and should not be construed as limiting the invention. The various components in the drawings are not to scale in order to clearly illustrate the details of the various components, and so the proportions of the various components in the drawings should not be taken as limiting.
Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
Claims (10)
1. A transmission system, comprising:
a transmission channel comprising a plurality of straight segments and a plurality of turnaround segments;
the rolling bars are arranged on the transmission channel;
a plurality of motors configured to drive the plurality of rollers to rotate;
a plurality of frequency converters configured to adjust operating states of the plurality of motors; and
a plurality of trays configured to carry an object to be irradiated;
the plurality of rolling rods drive the plurality of trays to move along the conveying channel;
the transmission system also comprises a transmission fault detection system, which comprises a PLC control unit and a communication unit, wherein,
the PLC control unit is connected with the plurality of frequency converters through the communication unit and is used for detecting output signal values of the plurality of frequency converters during operation;
the PLC control unit is set to compare the output signal values of the plurality of frequency converters with the reference value stored by the PLC control unit so as to judge whether the transmission process of irradiation processing has faults or not;
the PLC control unit is used for judging that a tray driven by the motor with a specific number is in failure; each motor is configured to drive a roller of each or both of the plurality of straight segments and the plurality of turnaround segments; the plurality of motors are arranged at the plurality of turning sections.
2. The system according to claim 1, wherein the output signal value is an output current value, and when the output current value is greater than the reference value, the PLC control unit judges that there is a failure in the transmission process of the irradiation processing.
3. The system of claim 1, wherein the fault comprises: at least one of the plurality of trays is blocked at the transport passage.
4. The system according to claim 1, further comprising an upper monitoring unit, wherein the upper monitoring unit is connected with the PLC control unit through the communication unit, and is configured to receive a determination result of the PLC control unit and disconnect a power supply of the irradiation source according to the determination result.
5. A method of transmission, comprising:
a plurality of motors are used for driving a plurality of rolling rods arranged on the transmission channel to rotate;
driving a plurality of trays bearing objects to be irradiated to move along a transmission channel by utilizing the plurality of rolling bars;
adjusting the operating states of the plurality of motors with a plurality of frequency converters;
detecting output signal values of a plurality of frequency converters in operation by using a PLC control unit; and
comparing the output signal values of the plurality of frequency converters with reference values stored by the PLC control unit by utilizing the PLC control unit so as to judge whether a fault exists in the transmission process of irradiation processing;
the method further comprises the following steps:
arranging a transmission channel to comprise a plurality of straight line sections and a plurality of turning sections;
the motors are provided with numbers, and the PLC control unit is utilized to judge that the tray driven by the motor with the specific number has a fault; arranging each motor to drive a roller of each or both of the plurality of straight segments and the plurality of turnaround segments; locating the plurality of motors at the plurality of turning sections.
6. The method according to claim 5, wherein the output signal value is an output current value, and when the output current value is greater than the reference value, the PLC control unit judges that a fault exists in the transmission process of the irradiation processing.
7. The method of claim 5, wherein the fault comprises: at least one of the plurality of trays is blocked at the transport passage.
8. The method of claim 5, further comprising: and receiving the judgment result of the PLC control unit by using an upper monitoring unit, and disconnecting the power supply of the irradiation source according to the judgment result.
9. The method of claim 8, further comprising: after the irradiation source is powered off, the fault is manually processed, or a fault processing unit is started to automatically process the fault.
10. The method of claim 5, further comprising: and detecting normal output signal values of the plurality of frequency converters when the transmission process is normal by using a PLC control unit as reference values, and storing the reference values.
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| CN201910275035.9A CN110002184B (en) | 2019-04-08 | 2019-04-08 | Transmission failure detection system, transmission failure detection method, and transmission system |
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| CN201910275035.9A CN110002184B (en) | 2019-04-08 | 2019-04-08 | Transmission failure detection system, transmission failure detection method, and transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS54153477A (en) * | 1978-05-24 | 1979-12-03 | Toshiba Corp | Automatic position controller for conveyor table |
| AU1751199A (en) * | 1997-12-12 | 1999-07-05 | Crisplant A/S | A conveyer system and a method for operating same |
| DE202006012191U1 (en) * | 2006-08-09 | 2006-10-19 | Sick Ag | Device for detection of material to be conveyed on roller has sensor which is integral component of roller of roller conveyor and has mechanical-electrical converter for producing or receiving from acoustic surface waves |
| CN101436047A (en) * | 2008-12-15 | 2009-05-20 | 芜湖新兴铸管有限责任公司 | Control system of industrial production material transferring equipment |
| CN102491067B (en) * | 2011-11-30 | 2014-12-10 | 中国神华能源股份有限公司 | Scraper conveyor fault detection device, system and method |
| CN202421785U (en) * | 2011-12-20 | 2012-09-05 | 鞍钢股份有限公司 | Protection system for longitudinal probe and actuating mechanism of magnetic leakage flaw detector |
| CN102633098B (en) * | 2012-04-12 | 2014-03-12 | 中联重科股份有限公司 | Control system, method and device of cold material conveying device and cold material conveying device |
| CN102676768B (en) * | 2012-05-25 | 2014-02-26 | 中冶南方（武汉）自动化有限公司 | Fault-tolerant control method and system for material tracking system |
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