CN214480593U - Redundant channel communication module of vibration monitoring meter - Google Patents
Redundant channel communication module of vibration monitoring meter Download PDFInfo
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- CN214480593U CN214480593U CN202120910985.7U CN202120910985U CN214480593U CN 214480593 U CN214480593 U CN 214480593U CN 202120910985 U CN202120910985 U CN 202120910985U CN 214480593 U CN214480593 U CN 214480593U
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Abstract
The utility model discloses a redundant passageway communication module of vibration monitoring table, it includes interface circuit, distribution/voting unit, optic fibre transceiver circuit, cable transceiver circuit and wireless transceiver circuit, interface circuit front end vibration monitoring table links to each other, and the rear end links to each other with distribution/voting unit, and the adjustment vibration monitoring table is waited to send the signal and send for distribution/voting unit, distribution/voting list output is connected with optic fibre transceiver circuit, cable transceiver circuit and wireless transceiver circuit respectively, treats that send and received signal distributes and votes the processing, and control signal receives and dispatches through optic fibre transceiver circuit, cable transceiver circuit, the three kinds of different routes of wireless transceiver circuit. The method utilizes the sufficient computing power of a high-speed embedded system to count and analyze the time, frequency and severity of communication abnormity of each communication circuit in real time, establish a relevant abnormity occurrence model and automatically select an optimal communication circuit for communication.
Description
The technical field is as follows:
the utility model relates to a rotating machinery vibration monitoring and protection instrument technical field, concretely relates to redundant passageway communication module of vibration monitoring table.
Background art:
the rotary machine is widely used in almost all industrial departments of electric power, petrifaction, metallurgy, manufacturing, aviation and the like, is key power equipment in production, and has great influence on safety production. In practical applications, the vibration of the rotating machine cannot be avoided, and the vibration easily causes damage to many important equipments, i.e. may cause serious wear of the equipments to reduce the service life thereof, or often causes various faults to reduce or lose the intended functions thereof, and if the faults cannot be found in time, may even cause serious accidents. Therefore, by monitoring the vibration signal of the rotary machine in real time, analyzing and processing the vibration signal, the information such as the running state, the development trend and the like of the equipment is mastered, and the information is helpful for relevant personnel to find problems before serious faults of the rotary machine equipment or serious accidents happen, and maintain and repair the equipment in advance, so that the serious accidents can be effectively avoided. Patent CN 208765838U discloses a digital type binary channels vibration monitoring table, and its specific working process is: the analog signal of the analog signal preprocessing circuit is converted into a digital signal through the A/D conversion circuit and then input into the central processing unit, the central processing unit calculates the speed, displacement or acceleration value for indicating the vibration working condition according to an algorithm, outputs a corresponding measured value through high-speed and high-precision conversion, linearly outputs the measured value containing information capable of representing the vibration parameter, and can be conveniently accessed to an upper computer such as a PLC, a DCS or a computer for deep analysis and processing. Meanwhile, the system has a digital state monitoring function, can be interconnected with state monitoring software, transmits static parameters (trend, real-time value, alarm state, gap voltage value and system OK state) or dynamic parameters (waveform diagram, frequency spectrum diagram, key phase signal and waterfall diagram), and analyzes the operation state of the system.
In practical applications, a vibration monitoring meter is generally used to monitor vibration signals of the rotating machine, and the monitoring results are transmitted to relevant workers through communication cables. In transmission, methods and mechanisms such as Cyclic Redundancy Check (CRC) and acknowledgement-retransmission are mostly adopted to ensure normal transmission. However, due to factors such as environmental electromagnetic interference, cable aging, insulation layer damage, and irregular wiring, data distortion and transmission failure occur frequently, and these situations are bursty and hidden, and are not easy to be checked and solved. These seriously affect the judgment of the vibration state of the rotating machine by workers, and can not find or even foresee the occurrence of problems or faults in time.
The utility model has the following contents:
an object of the utility model is to overcome the shortcoming that exists among the prior art, provide a redundant passageway communication module of vibration monitoring table.
In order to realize above-mentioned purpose, the utility model relates to a redundant passageway communication module of vibration monitoring table, including interface circuit, distribution/voting unit, optic fibre transceiver circuit, cable transceiver circuit and wireless transceiver circuit, interface circuit front end vibration monitoring table links to each other, and the rear end links to each other with distribution/voting unit, and the adjustment vibration monitoring table is waited to send the signal and send for distribution/voting unit, distribution/voting list output is connected with optic fibre transceiver circuit, cable transceiver circuit and wireless transceiver circuit respectively, treats that send and received signal distribute and vote the processing, and control signal receives and dispatches through optic fibre transceiver circuit, cable transceiver circuit, the three kinds of different routes of wireless transceiver circuit.
Specifically, the interface circuit adopts an analog-digital conversion chip and a logic level conversion chip to convert the signals output by the vibration monitoring meter into TTL levels, the front end of the interface circuit 1 is provided with 1 input/output terminal, the input/output terminals are connected with a communication cable interface of the vibration monitoring meter, and the rear end of the interface circuit is connected with a distribution/voting unit for adjusting the logic level and the speed of the signals to be matched with the distribution/voting unit.
Specifically, after caching the signal to be transmitted, the distributing/voting unit respectively sends the signal to be transmitted to three transceiver circuits, namely an optical fiber transceiver circuit, a cable transceiver circuit and a wireless transceiver circuit, and votes the received signal sent by the transceiver circuit to determine which circuit is adopted to receive the signal.
Specifically, the optical fiber transceiver circuit encodes and modulates the signal sent by the distribution/voting unit, sends the signal as an optical signal, demodulates and decodes the received optical signal, and sends the signal to the distribution/voting unit.
Specifically, the cable transceiver circuit encodes the signal sent by the distributing/voting unit, sends the encoded signal as an electrical signal, decodes the received electrical signal, and sends the decoded signal to the distributing/voting unit.
Specifically, the wireless transceiver circuit encodes and modulates the signal sent by the distributing/voting unit, sends the signal as a radio signal, demodulates and decodes the received radio signal, and sends the signal to the distributing/voting unit.
The redundant channel communication module of the vibration monitoring meter further comprises a shell, an interface circuit, a distribution/voting unit, an optical fiber receiving and transmitting circuit, a cable receiving and transmitting circuit and a wireless receiving and transmitting circuit are arranged in the shell, an input and output terminal of the interface circuit is fixed on the shell, a cable access port and an optical fiber access port are arranged on the shell and are respectively used for being connected with the cable receiving and transmitting circuit and the optical fiber receiving and transmitting circuit, a power interface is further arranged on the shell, and the power interface is externally connected with a 220VAC or 24VDC power supply.
Compared with the prior art, the utility model has the following advantage: (1) the method is suitable for various rotating machines with installed vibration monitoring meters, and the reliability of communication is improved with less investment; (2) the interface circuit adopts an analog-digital conversion chip, digitalizes analog quantity which has weak anti-interference capability and is easy to distort, and processes the analog quantity into a sequence consisting of 0 and 1, so that the equipment is flexible and accurate, the anti-interference capability is enhanced, and the long-distance transmission speed is high and the equipment is not distorted; (3) by utilizing sufficient computing power of a high-speed embedded system, counting and analyzing time, frequency and severity of communication abnormity of each communication circuit in real time, establishing a relevant abnormity occurrence model, and automatically selecting an optimal communication circuit for communication; (4) multiple communication circuits are used in parallel, and one circuit can be maintained without shutdown.
Description of the drawings:
fig. 1 is a block diagram of a circuit structure of a redundant channel communication module of the vibration monitoring meter according to the present invention.
Fig. 2 is a schematic diagram of a mechanical structure of a redundant channel communication module of the vibration monitoring meter according to the present invention.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the redundant channel communication module of a vibration monitoring meter according to this embodiment includes an interface circuit 1, a distribution/voting unit 2, an optical fiber transceiver circuit 3, a cable transceiver circuit 4, and a wireless transceiver circuit 5, where the front end of the interface circuit 1 is connected to the vibration monitoring meter, the rear end is connected to the distribution/voting unit 2, a signal to be sent of the vibration monitoring meter is adjusted and sent to the distribution/voting unit 2, an output end of the distribution/voting unit 2 is connected to the optical fiber transceiver circuit 3, the cable transceiver circuit 4, and the wireless transceiver circuit 5, respectively, so as to distribute and vote the signal to be sent and received, and a control signal is received and sent through three different paths, that is, the optical fiber transceiver circuit 3, the cable transceiver circuit 4, and the wireless transceiver circuit 5.
Specifically, the redundant channel communication modules are generally used in a group of two, and are used in a group.
Specifically, the interface circuit adopts an analog-digital conversion chip and a logic level conversion chip to convert the signals output by the vibration monitoring meter into TTL levels. The front end of the interface circuit 1 is provided with 1 input/output terminal, which is connected with the communication cable interface of the vibration monitoring meter, and the rear end is connected with the distribution/voting unit, which is used for adjusting the logic level and the speed of the signal to match with the distribution/voting unit 2.
Specifically, after caching a signal to be transmitted, the distributing/voting unit 2 respectively sends the signal to be transmitted to three transceiver circuits, namely an optical fiber transceiver circuit 3, a cable transceiver circuit 4 and a wireless transceiver circuit 5, for transmission; the received signals sent by the transceiver circuit are voted to determine which circuit received signal is used.
Specifically, the optical fiber transceiver circuit 3 encodes and modulates the signal sent by the distribution/voting unit 2, sends the signal as an optical signal, demodulates and decodes the received optical signal, and sends the signal to the distribution/voting unit 2. The optical signal is generally transmitted through an optical fiber, and the optical fiber transceiving circuit 3 adopts an integrated TTL optical module which is externally connected with an optical cable.
Specifically, the cable transceiver circuit 4 encodes the signal sent by the distribution/voting unit 2, sends the encoded signal as an electrical signal, decodes the received electrical signal, and sends the decoded signal to the distribution/voting unit 2. The electric signals are generally transmitted through cables, and the cable transceiver circuit 4 adopts RS485 logic level and is externally connected with cables.
Specifically, the wireless transceiver circuit 5 encodes and modulates the signal sent by the distributing/voting unit, sends the signal as a radio signal, demodulates and decodes the received radio signal, and sends the signal to the distributing/voting unit 2. The radio signal is generally transmitted based on WiFi, and the wireless transceiver circuit is connected with the WIFI module by adopting an MQTT protocol based on the WiFi.
As shown in fig. 2, the redundant channel communication module of the vibration monitoring meter further includes a housing, the interface circuit 1, the distribution/voting unit 2, the optical fiber transceiver circuit 3, the cable transceiver circuit 4, and the wireless transceiver circuit 5 are disposed in the housing 6, the input/output terminal 7 of the interface circuit 1 is fixed on the housing 6, the housing 6 is provided with a cable access port 8 and an optical fiber access port 9, which are respectively used for connecting the cable transceiver circuit 4 and the optical fiber transceiver circuit 3, the housing 6 is further provided with a power interface, and the power interface is externally connected with a 220VAC or 24VDC power supply, and is suitable for different field power supply systems.
The embodiment relates to a redundant channel communication module of a vibration monitoring table, which comprises the following specific use methods:
(1) the front end of the interface circuit 1 is connected with a vibration monitoring meter, signals to be sent of the vibration monitoring meter are adjusted and sent to the distribution/voting unit 2, the distribution/voting unit 2 controls the signals to be sent through three different paths of the optical fiber transceiving circuit 3, the cable transceiving circuit 4 and the wireless transceiving circuit 5, and all communication data are provided with data sections for statistical analysis such as time stamps, CRC codes and sending sequence numbers during sending.
(2) The distribution/voting unit receives the data sent by the three transceiver circuits in sequence, preferentially adopts the data sent by the optimal communication circuit, adopts the data of the suboptimal transceiver circuit when the data of the optimal communication circuit is abnormal (CRC error, overtime, no response and the like), and simultaneously compares whether the abnormality accords with an abnormality occurrence model. If the data are matched, updating the model data and prompting the abnormality to the user. If not, the fault is an accidental fault, and the user is prompted to be abnormal but the model is not updated. The suboptimal transceiver circuit is similar to the exception. And when all circuits are abnormal, the degradation adopts two-out-of-three fault-tolerant logic to determine data. And when the data cannot be determined even if the third value is two, rejecting any subsequent data transceiving.
Wherein, the built-in software of the communication module counts the occurrence frequency of communication abnormity such as communication delay, CRC error check, transmission sequence error, no response and the like of each communication circuit in unit time (such as 3 minutes) in real time, scores the communication quality of the communication circuit according to the severity of the communication abnormity, such as no response 1 time counting 5 minutes, transmission sequence error counting 3 minutes, CRC error counting 1 minute, communication delay counting 0.1 minute every 10ms, the communication circuit with the minimum score is the optimal communication circuit in the unit time, sums up the communication quality scores of all the communication circuits in 24 hours a day to form a comparison table of time and the optimal communication circuit, automatically switches the optimal communication circuit according to the current time by the communication module software, continuously updates and accumulates the communication quality scores of the communication circuits every day every time, and gradually forms an optimal communication circuit model every month, every day and every time, and forming a corresponding abnormal occurrence model to obtain a communication abnormal report, actively finding an abnormal communication circuit and an abnormal reason according to the two models, and arranging the overhaul and maintenance of the communication circuit in advance.
The redundant channel communication module of the vibration monitoring meter related to the embodiment adopts an intelligent fault-tolerant algorithm, which is different from passive two-out-of-three fault-tolerant logic and weight sequence fault-tolerant logic, and the intelligent fault-tolerant algorithm is based on a communication abnormity generation model and actively selects a circuit with no or few communication abnormity. Meanwhile, the three-out-of-two fault-tolerant logic and the weight sequence fault-tolerant logic are downward compatible, and the communication can still be ensured to be normal when the sudden communication abnormality of the model failure occurs.
Claims (7)
1. A redundant channel communication module of a vibration monitoring meter is characterized by comprising an interface circuit, a distribution/voting unit, an optical fiber transceiving circuit, a cable transceiving circuit and a wireless transceiving circuit, wherein the front end of the interface circuit is connected with the vibration monitoring meter, the rear end of the interface circuit is connected with the distribution/voting unit, signals to be sent of the vibration monitoring meter are adjusted and sent to the distribution/voting unit, the output end of the distribution/voting unit is respectively connected with the optical fiber transceiving circuit, the cable transceiving circuit and the wireless transceiving circuit, the signals to be sent and received are distributed and voted, and control signals are sent and received through three different paths of the optical fiber transceiving circuit, the cable transceiving circuit and the wireless transceiving circuit.
2. The redundancy channel communication module of the vibration monitoring meter as claimed in claim 1, wherein the interface circuit adopts an analog-to-digital conversion chip and a logic level conversion chip to convert the signal output by the vibration monitoring meter into TTL level, the interface circuit 1 has 1 input/output terminal at the front end, the number of the input/output terminal is 1, the input/output terminal is connected to the communication cable interface of the vibration monitoring meter, and the back end is connected to the distributing/voting unit for adjusting the logic level and the speed of the signal to match the distributing/voting unit.
3. The redundancy channel communication module of the vibration monitoring meter according to claim 1, wherein the distributing/voting unit buffers the signal to be transmitted, and then sends the buffered signal to the three transceiver circuits, namely the optical fiber transceiver circuit, the cable transceiver circuit and the wireless transceiver circuit, so as to vote on the received signal sent by the transceiver circuits, and determine which circuit is used to receive the signal.
4. The redundancy channel communication module of the vibration monitoring meter according to claim 1, wherein the optical fiber transceiver circuit encodes and modulates the signal sent by the distribution/voting unit, sends the signal as an optical signal, demodulates and decodes the received optical signal, and sends the signal to the distribution/voting unit.
5. The redundant channel communication module of the vibration monitoring meter according to claim 1, wherein the cable transceiver circuit encodes the signal sent by the distribution/voting unit, sends the encoded signal as an electrical signal, decodes the received electrical signal, and sends the decoded signal to the distribution/voting unit.
6. The redundant channel communication module of the vibration monitoring meter according to claim 1, wherein the wireless transceiver circuit encodes and modulates the signals sent by the distribution/voting unit, sends the signals as radio signals, demodulates and decodes the received radio signals, and sends the signals to the distribution/voting unit.
7. The redundant channel communication module of the vibration monitoring meter according to claim 1, wherein the redundant channel communication module of the vibration monitoring meter further comprises a housing, the interface circuit, the distribution/voting unit, the optical fiber transceiver circuit, the cable transceiver circuit and the wireless transceiver circuit are disposed in the housing, the input/output terminal of the interface circuit is fixed on the housing, the housing is provided with a cable access port and an optical fiber access port for connecting with the cable transceiver circuit and the optical fiber transceiver circuit, respectively, the housing is further provided with a power interface, and the power interface is externally connected with a 220VAC or 24VDC power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120910985.7U CN214480593U (en) | 2021-04-29 | 2021-04-29 | Redundant channel communication module of vibration monitoring meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120910985.7U CN214480593U (en) | 2021-04-29 | 2021-04-29 | Redundant channel communication module of vibration monitoring meter |
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| CN214480593U true CN214480593U (en) | 2021-10-22 |
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| CN202120910985.7U Active CN214480593U (en) | 2021-04-29 | 2021-04-29 | Redundant channel communication module of vibration monitoring meter |
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