Communication system

Abstract

The embodiment of the utility model discloses a communication system, which can comprise a master control device, a standby control device, a plurality of slave devices and an adjusting circuit, and is characterized in that the master control device is connected with the plurality of slave devices and is used for monitoring the plurality of slave devices; the standby control device is connected with the slave devices and the master control device and used for monitoring the slave devices when it is detected that the master control device monitors the slave devices abnormally.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of data transmission, and in particular, to a communication system. Background Art

[0002] The Czochralski single crystal furnace is a key equipment for manufacturing integrated circuits and solar cell single crystal substrates. Its process includes evacuation, chemical treatment, seeding, shouldering, equal diameter, finishing and cooling. In these stages, the electrical control system of the single crystal furnace plays a vital role, responsible for monitoring and controlling the entire production process. The traditional electrical control system includes the main control device, the slave device and the communication interface between them. Among them, the RS485 communication interface is widely used due to its high-speed transmission, long-distance transmission, multi-point communication, and strong anti-interference ability.

[0003] However, the industrial field environment is complex and changeable. Factors such as equipment aging, mechanical vibration, and human error may affect the stability of the RS485 communication line, resulting in communication interruption between the master control device and the slave device. Once a communication failure occurs, the master control device cannot effectively monitor the slave device, which in turn affects the normal operation of the single crystal furnace, and may cause the quality of the crystal rod to decline or the production process to be forced to be interrupted. Especially during the long crystal pulling cycle of the single crystal furnace, any communication interruption may cause significant economic losses. Utility Model Content

[0004] In view of this, the embodiments of the present disclosure are intended to provide a communication system that can solve the technical problem of insufficient monitoring accuracy between slave devices in the related art.

[0005] The technical solution of the embodiment of the present disclosure is implemented as follows:

[0006] In a first aspect, an embodiment of the present disclosure provides a communication system, including a master control device, a backup control device, a plurality of slave devices, and a regulating circuit, wherein:

[0007] The master control device is connected to a plurality of slave devices for monitoring the plurality of slave devices;

[0008] The backup control device is connected to the plurality of slave devices and the master control device, and is used to monitor the plurality of slave devices when it is detected that the master control device monitors the slave devices abnormally.

[0009] In some examples, the system further includes:

[0010] A regulating circuit connected between the main control device and the backup control device;

[0011] When the backup control device detects that the monitoring of the slave device by the main control device is abnormal, the backup control device cuts off the communication connection between the main control device and the slave device through the adjustment circuit.

[0012] In some examples, the main control device outputs a first control signal when operating normally;

[0013] The regulating circuit cuts off the communication connection between the backup control device and the plurality of slave devices through the first control signal, and enables the master control device to monitor the plurality of slave devices.

[0014] In some examples, the backup control device is in a standby state when the main control device is working normally; and switches to a working state when the monitoring of the slave device by the main control device is abnormal.

[0015] In some examples, the backup control device outputs a second control signal when in standby mode; the first control signal and the second control signal can control the regulation circuit so that the main control device is communicatively connected to the plurality of slave devices, and the communication connection between the backup control device and the slave devices is disconnected.

[0016] In some examples, the backup control device outputs a third control signal when in standby mode; the first control signal and the third control signal can control the regulation circuit to shut down the communication connection between the master control device and the plurality of slave devices, and enable communication connection between the backup control device and the slave devices.

[0017] In some examples, the regulating circuit includes:

[0018] A first switch element, a first end of which is connected to the control port of the main control device, and a second end of which is connected to the first node;

[0019] A first NOT gate, wherein the first end is connected to the control port of the backup control device, and the second end is connected to the control end of the first switch element;

[0020] A second switch element, a first end of which is connected to the communication port of the master control device, a second end of which is connected to the slave device, and a control end of which is connected to the first node;

[0021] a third switch element, a first end of which is connected to the communication port of the backup control port, and a second end of which is connected to the slave device;

[0022] The second NOT gate has a first end connected to the first node and a second end connected to the control end of the third switch element.

[0023] In some examples, the backup controller device includes:

[0024] A detection module, used for detecting the main control device;

[0025] A control module, used for outputting a control signal to control the regulating circuit;

[0026] A monitoring module is used to monitor the slave device.

[0027] In some examples, the backup control device is used to monitor a slave device that has an abnormal monitoring behavior of the master control device.

[0028] In some examples, the main control device and the backup control device are both RS485 communication devices.

[0029] The embodiment of the present disclosure provides a communication system; by setting a main control device and a backup control device, the present disclosure can quickly switch to the backup control device when the main control device fails or the communication with the slave device is abnormal, and continue to monitor the slave device, thereby significantly improving the stability and reliability of the entire system. The fault tolerance of the system is enhanced, and the continuous and stable operation of the electrical control system of the single crystal furnace can be guaranteed even in a complex industrial field environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a communication system provided in an embodiment of the present disclosure.

[0031] Figure 2 A schematic diagram of the structure of a communication system provided with a regulating circuit is provided in an embodiment of the present disclosure.

[0032] Figure 3 A schematic diagram of the structure of another communication system provided in an embodiment of the present disclosure.

[0033] Figure 4 A schematic diagram of the structure of another communication system provided with a regulating circuit provided in an embodiment of the present disclosure.

[0034] Figure 5 A schematic diagram of the structure of another communication system provided in an embodiment of the present disclosure.

[0035] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0037] The Czochralski single crystal furnace is a main equipment for efficiently manufacturing integrated circuits and solar cell single crystal substrates. Its main process stages are: evacuation, material processing, seeding, shouldering, equal diameter, finishing, and cooling. First, the polysilicon raw material is placed in the quartz crucible of the furnace body for high-temperature melting, so that the furnace body is maintained at a low vacuum, and argon gas is introduced for inert gas protection. Then, after the seed crystal is inserted into the polysilicon melt, a supercooled state is formed around the seed crystal to allow the crystal to grow. During the process, the crystal and the crucible are kept rotating in opposite directions. Finally, the seed crystal is slowly lifted to form a single crystal rod.

[0038] The electrical control part of the single crystal furnace mainly includes the control system, human-computer interaction system, drive system, input and output control unit, etc., which are then connected through the field bus. In order to ensure the smooth progress of crystal pulling, a stable network system architecture is indispensable during the process. The crystal pulling cycle of a single crystal furnace is generally about 120 hours. It is affected by various factors during the crystal pulling cycle. If there are problems such as line breakage, liquid level system, furnace pressure, etc., the quality of the crystal rod will be affected, causing the current crystal rod to be melted back and re-pulled. The life of the quartz crucible containing polycrystalline silicon is more than 300 hours. If repeated pulling fails, in view of the life of the quartz crucible, it can only be used for hanging material processing, and polycrystalline silicon rods are pulled. Polycrystalline silicon rods are not required for production. This will cause certain economic losses. Therefore, apart from the factors of inappropriate process parameter settings, equipment stability is the main factor for the success of pulling single crystal silicon rods.

[0039] In the electrical design of a single crystal furnace, the electrical control part not only needs to meet basic requirements, but also needs high system stability and no failures during a long crystal pulling cycle. Due to the influence of factors such as the on-site environment, the communication between the electrical control cabinet and other parts on site is often far away from the control part and the controlled part. Based on the characteristics of the network communication type and cost considerations, a communication network structure based on RS485 serial is often used.

[0040] RS485 belongs to the physical layer, and usually adopts two-wire half-duplex multi-point communication, and can communicate effectively over long distances in an environment with interference such as electronic noise. Therefore, it is widely used in industrial automation, instrumentation, communication equipment and other fields. Its characteristics include: high-speed transmission, long-distance transmission, multi-point communication, strong anti-interference ability, flexibility and scalability. However, the industrial field environment is complicated, and factors such as equipment aging, mechanical vibration, and human error increase the risk of poor network communication. If the traditional single master-slave network structure is adopted, the RS485 communication cable is disconnected, then the information of the slave device cannot be input to the main control device, and the device cannot make correct control, resulting in the failure of the crystal rod to be pulled successfully.

[0041] Based on this, the present disclosure first provides a control system, referring to Figure 1 The control system may include a control device, a backup control device 2 , a plurality of slave devices 3 and a regulating circuit 4 .

[0042] The main control device 1 is connected to multiple slave devices 3 to monitor the multiple slave devices 3;

[0043] The backup control device 2 is connected to the multiple slave devices 3 and the master control device, and is used to monitor the multiple slave devices 3 when it is detected that the master control device 1 monitors the slave devices 3 abnormally.

[0044] In some examples, the master control device 1 can be used to monitor multiple slave devices 3, that is, to obtain data collected by the slave devices 3, which are used to collect various parameters during the crystal pulling process. The master control device 1 is in communication connection with the multiple slave devices 3.

[0045] Optionally, the main control device 1 can be a communication device suitable for multi-point communication in an industrial environment, and can be applied to industrial automation, monitoring systems, data acquisition and other scenarios. For example, the main control device 1 can be an RS485 communication device, RS232 communication device, RS422 communication device, etc., and can also be customized according to needs, which is not repeated in this example.

[0046] In this example implementation, the slave device 3 is a device that receives commands from the main control device 1 and performs specific tasks. It can be a sensor, actuator, or other type of device. For example, the slave device 3 can be a temperature sensor, a pressure sensor, a motor, an alarm, a relay, a liquid level sensor, etc. Different slave devices 3 can also be set according to user needs, which will not be elaborated in this example implementation.

[0047] The backup control device 2 is connected to the slave device 3 and the main control device 1 at the same time, that is, each slave device 3 is connected to the main control device 1 and the backup control device 2 at the same time. The backup control device 2 is used to detect the signal flow of the main control device, that is, the main control device 1 receives the signal of the above-mentioned slave device 3. When the backup device detects that the monitoring of the above-mentioned slave device 3 by the main control device 1 is abnormal, the backup control device 2 can also monitor multiple slave devices 3.

[0048] Optionally, when the master control device 1 is unable to receive data sent by the slave device 3, or the time for receiving data from the slave device 3 exceeds a predetermined time, it is determined that the monitoring of the slave device 3 by the master control device 1 is abnormal. At this time, the backup control device 2 monitors the slave device 3 to prevent data reception confusion caused by the abnormality of the master control device 1, or losses caused by untimely data reception.

[0049] In some examples, reference Figure 2 The above system may further include a regulating circuit 4 connected between the above main control device 1 and the backup control device 2. When the above regulating circuit 4 is included, the backup device can cut off the communication connection between the main control device 1 and the slave device 3 through the regulating device.

[0050] In some examples, the above-mentioned backup control device 2 may include two states, namely a standby state and a working state. When the above-mentioned backup control device 2 is in the standby state, the backup control device 2 is used to monitor the above-mentioned main control device 1. When it is detected that the monitoring of the slave device 3 by the main control device 1 is abnormal, the backup control device 2 switches the state to the working state. When the backup control device 2 is in the working state, it is used to monitor the above-mentioned multiple slave devices 3.

[0051] Optionally, when the main control device 1 is working, it outputs a first control signal, where the first control signal is used to cut off the communication connection between the backup control device 2 and the slave device 3 , and enables the main control device 1 to monitor the multiple slave devices 3 .

[0052] In some examples, when the backup control device 2 is in standby mode, the backup control device 2 outputs a second control signal, and the second control signal and the first control signal cooperatively control the regulating circuit 4 so that the main control room device is communicatively connected with a plurality of slave devices 3, and the communication connection between the backup control device 2 and the slave devices 3 is disconnected.

[0053] In some examples, when the backup control device 2 is in working condition, the backup control device 2 outputs a third control signal, and the third control signal cooperates with the first control signal to control the regulation circuit 4, shuts off the communication connection between the main control device 1 and the plurality of slave devices 3, and enables the backup control device 2 and the slave devices 3 to communicate with each other.

[0054] When the above-mentioned main control room equipment fails, it can notify the monitoring of the slave equipment 3 to avoid the transmission of erroneous data on the main control equipment 1 box and the controller.

[0055] In some examples, reference Figure 3 and Figure 4 The above-mentioned regulating circuit 4 may include a first switch element T1, a first NOT gate A1, a second switch element T2, a second NOT gate A2 and a third switch element T3, wherein a first end of the first switch element T1 is connected to the control port of the main control device 1, and a second end is connected to the first node; a first end of the first NOT gate A1 is connected to the control port of the backup control device 2, and a second end is connected to the control end of the first switch element T1; a first end of the second switch element T2 is connected to the communication port of the main control device 1, a second end is connected to the slave device 3, and a control end is connected to the first node; a first end of the third switch element T3 is connected to the communication port of the backup control port, and a second end is connected to the slave device 3; a first end of the second NOT gate A2 is connected to the first node, and a second end is connected to the control end of the third switch element T3.

[0056] Optionally, the first switching element T1, the second switching element T2 and the third switching element T3 are all switching transistors, and may include a first end, a second end and a control end, wherein the first end may be a source, the second end may be a drain, and the control end may be a gate, and optionally, the first end may be a drain, and the second end may be a source.

[0057] It should be noted that the switch transistors disclosed in the present invention are all N-channel transistors, which are turned on at a high level. Compared with P-channel transistors, N-channel transistors have faster switching speeds and lower on-resistance, which can improve efficiency and reduce power consumption.

[0058] In some examples, the switching transistor may also be a P-channel transistor, in which case the transistor is turned on at a low level.

[0059] The following description is made by taking the above-mentioned switch transistors as N-channel transistors as an example.

[0060] In some examples, the first control signal is a high level signal, the second control signal is a low level signal, and the third control signal is a high level signal.

[0061] When the above-mentioned backup control device 2 is in standby state, the second control signal is converted into a high-level signal through the first NOT gate A1, and the above-mentioned first open element is turned on, so that the first control signal can be transmitted to the first node through the first switch element T1. The first node is a high-level signal, which can make the second switch element T2 turned on, so that the above-mentioned main control device 1 can complete communication with multiple slave devices 3.

[0062] The high level of the first node becomes a low level signal after passing through the second NOT gate A2, so that the second switch element T2 is turned off, that is, the communication connection between the backup control device 2 and the plurality of slave devices 3 is disconnected.

[0063] When the backup control device 2 detects that the main control device 1 monitors the slave device 3 abnormally, it outputs a third control signal. Since the main control device 1 cannot know that it is abnormal, the main control device 1 still outputs the first control signal. At this time, both the main control device 1 and the backup control device 2 output high-level signals.

[0064] The third control signal becomes a low-level signal after passing through the NOT gate, that is, the first switch element T1 is turned off, the first control signal cannot be transmitted to the first node, and the first node is a low-level signal. At this time, the second switch element T2 is in the off state, that is, the communication connection between the main control device 1 and multiple slave devices 3 is cut off.

[0065] The first node is a low level signal, which becomes a high level signal after passing through the second NOT gate A2, so that the third switch element T3 can be turned on, thereby enabling the standby control circuit to monitor multiple devices.

[0066] In some examples, reference Figure 5 The backup control device 2 may include a detection module, a control module and a monitoring module, wherein the detection module is used to detect the main control device 1, the control module is used to output a second control signal or a third control signal according to the detection result of the above detection module to control the above adjustment circuit 4, and the monitoring module is used to monitor the slave device 3 when the above backup control device 2 is in working state.

[0067] In other example implementations, when it is detected that the master control device 1 monitors some of the slave devices 3 abnormally, the backup control device 2 is used to monitor the abnormal slave devices 3. For example, assuming that the number of slave devices 3 includes four, numbered 1, 2, 3 and 4 respectively, and assuming that the backup control device 2 detects that the master control device 1 monitors the slave device 31 abnormally, but the detection of the other three slave devices 3 is normal, the backup control device 2 only monitors the above-mentioned slave device 31, and sends a signal of the master device's monitoring abnormality to the superior controller.

[0068] The communication system provided by the embodiment of the present disclosure, by setting the main control device 1 and the backup control device 2, the system can automatically switch to the backup control device 2 when the main control device 1 fails, thereby ensuring the continuous monitoring of the slave device 3 and improving the reliability of the entire system. The backup control device 2 can quickly cut off the communication connection between the main control device 1 and the slave device 3 through the adjustment circuit 4, and take over the monitoring task, reducing the downtime of the system caused by the failure. When the main control device 1 is working normally, the adjustment circuit 4 ensures the communication connection between the main control device 1 and the slave device 3, and disconnects the communication connection between the backup control device 2 and the slave device 3, avoiding communication conflicts. The backup control device 2 is in a standby state when the main control device 1 is working normally, and only switches to a working state when the monitoring is abnormal. This design optimizes the utilization of system resources and reduces unnecessary energy consumption. By switching the control signal, the system can flexibly switch between the main control device 1 and the backup control device 2 to adapt to different monitoring requirements and fault conditions. The control signal output by the backup control device 2 in the standby state can ensure that when the main control device 1 fails, it can quickly switch to the backup control device 2, thereby ensuring the safety of the system. The design of the adjustment circuit 4 includes multiple switching elements and logic gates, which can realize complex control logic and ensure the correct switching of communication connections under different circumstances. The backup control device 2 integrates the detection module, the control module and the monitoring module, providing an integrated monitoring solution, simplifying the system design and operation. The backup control device 2 is specially designed to monitor the slave device 3 of the main control device 1 for abnormal monitoring, and improves the response capability to specific fault conditions. Both the main control device 1 and the backup control device 2 are RS485 communication devices. This standardized communication interface simplifies the compatibility of the equipment and the scalability of the system.

[0069] Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present disclosure can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. Storage media can be any available media that can be accessed by general or special-purpose computers.

[0070] In the above embodiments, the description of each embodiment has its own emphasis. For the part not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosures of the present application. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not applied for by the present disclosure.

[0072] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A communication system, characterized in that: It includes a main control device, a backup control device, a plurality of slave devices and a regulating circuit, wherein: The master control device is connected to a plurality of slave devices for monitoring the plurality of slave devices; The backup control device is connected to the plurality of slave devices and the main control device, and is used to monitor the plurality of slave devices when it is detected that the monitoring of the slave devices by the main control device is abnormal.

2. The communication system according to claim 1, characterized in that The system further comprises: A regulating circuit connected between the main control device and the backup control device; When the backup control device detects that the monitoring of the slave device by the main control device is abnormal, the backup control device cuts off the communication connection between the main control device and the slave device through the adjustment circuit.

3. The communication system according to claim 2, characterized in that The main control device outputs a first control signal when operating normally; The regulating circuit cuts off the communication connection between the backup control device and the plurality of slave devices through the first control signal, and enables the master control device to monitor the plurality of slave devices.

4. The communication system according to claim 3, characterized in that: The backup control device is in a standby state when the main control device is working normally; and is switched to a working state when the monitoring of the slave device by the main control device is abnormal.

5. The communication system according to claim 4, characterized in that: When the backup control device is in standby mode, it outputs a second control signal; the first control signal and the second control signal can control the regulating circuit so that the main control device is communicatively connected with the plurality of slave devices, and the communication connection between the backup control device and the slave devices is disconnected.

6. The communication system according to claim 4, characterized in that: When the backup control device is in standby mode, it outputs a third control signal; the first control signal and the third control signal can control the regulating circuit to shut down the communication connection between the main control device and the plurality of slave devices, and enable the communication connection between the backup control device and the slave devices.

7. The communication system according to any one of claims 1 to 6, characterized in that: The regulating circuit comprises: A first switch element, a first end of which is connected to the control port of the main control device, and a second end of which is connected to the first node; A first NOT gate, a first end of which is connected to the control port of the backup control device, and a second end of which is connected to the control end of the first switch element; A second switch element, a first end of which is connected to the communication port of the master control device, a second end of which is connected to the slave device, and a control end of which is connected to the first node; a third switch element, a first end of which is connected to the communication port of the backup control device and a second end of which is connected to the slave device; The second NOT gate has a first end connected to the first node and a second end connected to the control end of the third switch element.

8. The communication system according to any one of claims 2 to 6, characterized in that: The backup control device comprises: A detection module, used for detecting the main control device; A control module, used for outputting a control signal to control the regulating circuit; A monitoring module is used to monitor the slave device.

9. The communication system according to any one of claims 1 to 6, characterized in that: The backup control device is used to monitor the slave device that has abnormal monitoring by the main control device.

10. The communication system according to any one of claims 1 to 6, characterized in that: The main control device and the backup control device are both RS485 communication devices.

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