CN104502742A - Voltage fault monitoring system and method for electron irradiation accelerator - Google Patents
Voltage fault monitoring system and method for electron irradiation accelerator Download PDFInfo
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- CN104502742A CN104502742A CN201410704316.9A CN201410704316A CN104502742A CN 104502742 A CN104502742 A CN 104502742A CN 201410704316 A CN201410704316 A CN 201410704316A CN 104502742 A CN104502742 A CN 104502742A
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Abstract
The invention discloses a voltage fault monitoring system and method for an electron irradiation accelerator. The system comprises n voltage detectors which are used for detecting the voltages of n to-be-measured points, and also comprises a communication node network and a database. The communication node network consists of n communication node network units and one network access point unit, thereby forming a star-shaped topological structure. The n communication node network units are connected with the network access point unit in a mode of wireless communication. The network access point unit is connected with the database through a network line. The input ends of the n voltage detectors are respectively connected with n voltage to-be-measured points in the accelerator, so as to collect the voltages of the to-be-measured points. The output ends of the n voltage detectors are respectively connected with n communication node units. According to the data in the database and a preset fault status data, the voltage fault status of the accelerator is obtained. The system can accurately positioning the fault position through the detection of the voltage of a key part.
Description
Technical field
The invention belongs to accelerator monitoring technique field, more specifically, relate to a kind of voltage failure monitoring system and method for electron accelerator.
Background technology
Electron accelerator is one of key equipment of irradiation processing industry, be widely used in industrial cable, heat-shrinkable tube, engineering plastics, semiconductor device surface application, the vulcanization of rubber, superpolymer foaming and food antiseptic is fresh-keeping, medical treatment and the aspect such as health product sterilization, drinkable water process, trade refuse process, dust treatment, its product is almost deep into the every field of human lives.Electron accelerator is also applied to other fields such as low-energy nuclear physics research, kernel analysis, biomedicine except being applied to irradiation processing.
High power DC high-voltage power supply is exactly parts the most key in electron accelerator system, the high-voltage electric field that the energy source of electron beam provides in high-voltage DC power supply, the voltage of this high-voltage DC power supply is up to hundreds of kilovolt even several thousand kilovolts, simultaneously because output voltage is that direct current can not be measured with transformer pressure-reducing, existing metering system is survey overall output voltage after resistance heap dividing potential drop, this scheme has two shortcomings, first bulky divider resistance heap is needed, second voltage that can not detect power supply key position, can not tracing trouble position when High voltage output fault.
First traditional metering circuit measures the very high magnitude of voltage of a voltage by electric resistance partial pressure, voltage due to accelerator is very high DC voltage, often arrive hundreds of kilovolt to several megavolt, owing to being that the traditional voltage transmitter of DC high voltage cannot use, this DC voltage will be dropped to measurable voltage range just needs a large amount of divider resistances to dividing potential drop of connecting, these resistance constitute the other large resistance heap of volume, a resistance piles the voltage can only measuring a point simultaneously, space in accelerator does not allow to install multiple resistance heap, so just can only measure the voltage of output point, and the voltage of other key points in accelerator cannot be measured, like this cannot accurate fault location when accelerator fault.
Summary of the invention
For the defect of prior art, the object of the present invention is to provide a kind of voltage failure monitoring system and method for electron accelerator, be intended to solve existing voltage detecting system bulky, and can not detect that key position voltage causes cannot accurate fault location, the problem of fault diagnosis existing defects.
The invention provides a kind of voltage failure monitoring system of electron accelerator, comprising: for measuring n voltage-level detector of n tested point voltage, communication node network and database respectively; Described communication node network forms stelliform connection topology configuration by n communication node unit and a network access point element, and n communication node unit is connected with described network access point element by the mode of radio communication; Described network access point element is by netting twine and described DataBase combining; The input end of n voltage-level detector is respectively used to connect n voltage tested point in accelerator, and gather the voltage of tested point, the output terminal of n voltage-level detector is connected with n communication node unit respectively; During work, the relative voltage of n voltage-level detector Real-time Collection n voltage tested point, respectively the relative voltage of tested point is sent to network access point element by the mode of radio communication by n communication node unit, the relative voltage of each tested point and the positional information of each tested point are sent to database by network access point element; The Voltage Fault Status of accelerator is obtained according to the data in database and the fault state data that presets.
Further, described voltage-level detector comprises voltage conditioning sample circuit, for measuring the voltage of key node in electron accelerator and by voltage signal digitizing, obtaining the relative voltage of tested point.
Further, described voltage conditioning sample circuit comprises the first operational amplifier U1, the second operational amplifier U2, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1 and electric capacity C2; The input end of sample circuit is nursed one's health in one end of described resistance R1 as described voltage, the other end of described resistance R1 is connected to the normal phase input end of described first operational amplifier U1, and the other end of described resistance R1 is also by described resistance R2 ground connection; The reverse input end of described first operational amplifier U1 is connected to the output terminal of described first operational amplifier U1, and the output terminal of described first operational amplifier U1 is connected to the normal phase input end of described second operational amplifier U2 by the resistance R3 that is sequentially connected in series and resistance R4; The inverting input of described second operational amplifier U2 is connected to the output terminal of described second operational amplifier U2, and the output terminal of described second operational amplifier U2 nurses one's health the output terminal of sample circuit as described voltage; What one end of described electric capacity C1 was connected to described resistance R3 and described resistance R4 is connected in series end, and the other end of described electric capacity C1 is connected to the output terminal of described second operational amplifier U2; One end of described electric capacity C2 is connected to the normal phase input end of described second operational amplifier U2, the other end ground connection of described electric capacity C2.
Present invention also offers a kind of voltage failure monitoring method of electron accelerator, comprise the steps:
S1: at key point distributed arrangement n node to be measured of electron accelerator; Described key point refers to position and the high failure rate point of easy high voltage arc in accelerator;
S2: the relative voltage measuring each node to be measured, and by the mode of radio communication, voltage measurement data is sent to Network Access Point;
S3: the information of voltage and its positional information that are obtained each node by Network Access Point, and by these information stored in database;
S4: by the Real-time Monitoring Data in process database and the fault state data pre-deposited, judge the working condition of accelerator, and the operation conditions that will speed up device shows with patterned method.
Further, n node to be measured communicates with the public channel of Network Access Point.
Further, n node to be measured communicates with adopting the media access control protocol of contention type between Network Access Point, is specially:
(1) each communication node unit first carries out primary carrier monitoring before transmitting, if now channel idle, the time that then random delay one section is shorter carries out primary carrier monitoring again, if now channel is still idle, so can think that channel does not disturb in this time period, can transmission frame data;
(2) each communication node unit sends the node location information of oneself, and Network Access Point is to the communication node unit allocate communications address of diverse location, and this stage terminates rear networking success;
(3) communication node unit sends the Real-Time Monitoring information of voltage, judges the physical location of communication node unit thus be supplied to database information of voltage, node location information and temporal information after Network Access Point receives packet by mailing address.
Further, described Real-Time Monitoring packets of information is containing information of voltage and sampling time information.
By the above technical scheme that the present invention conceives, compared with prior art, owing to have employed distributed metering system, no longer needed by the relative value of measuring voltage to measure high voltage dividing potential drop, eliminate the resistance heap that volume is other large, simultaneously distributed measurement network can measure the voltage of more points, can accurate fault location by the voltage detecting key point; Can obtain detection system volume little, metrical information amount is large, maintains easily and diagnoses accelerator operating mode beneficial effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the voltage failure monitoring system of the electron accelerator that the embodiment of the present invention provides;
Fig. 2 is the physical circuit figure of voltage signal conditioning sample circuit in the voltage failure monitoring system of the electron accelerator that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The present invention adopts distributed measurement; If use radio communication to complete measurement, just can remove the coupling of high direct voltage and signal of communication, directly measure a lower relative voltage under the noble potential that just can suspend at and no longer need huge divider resistance to pile.Based on this thought, the present invention proposes a kind of distributed measuring system, voltage measurement node is laid by the key point (in accelerator the position of easy high voltage arc and high failure rate point) at accelerator, allow these voltage measurement nodes directly measure relative voltage, and provide the information of voltage of node to accelerator guardian by wireless communication network.Existing voltage detecting system can be solved bulky, simultaneously can not detect key position voltage and be unfavorable for the defect of fault diagnosis, thus realizing the monitoring of electron accelerator voltage highly effective and safe.The intelligentized complete monitoring to accelerator voltage can be applied to.
In embodiments of the present invention, a kind of voltage failure monitoring method of electron accelerator, comprises the steps:
S1: in the key point of electron accelerator, distributed arrangement n node to be measured;
S2: the relative voltage measuring each node to be measured, and by the mode of radio communication, voltage measurement data is sent to Network Access Point;
S3: host computer obtains information of voltage and its positional information of each node by Network Access Point, and by these information stored in database;
S4: host computer is by the Real-time Monitoring Data in process database and the fault state data pre-deposited, the working condition of accelerator is judged by the numerical value under coupling ad-hoc location voltage measuring value and nominal situation, the value that cannot mate again with the values match in Mishap Database, pre-deposited the information that the scope of false voltage is corresponding with fault type in Mishap Database.A kind of fault type is to the deviation that should have multiple measuring voltage, add the matching value of four false voltages in the present system often kind of fault type, when mating fault, four eigenwerts are obtained with the information of voltage of node, these four eigenwerts can obtain the mark of a coupling through a marking algorithm, if coupling mark is greater than 95 points, then thinks that accelerator has this fault, after the fault type of Mishap Database is all mated one time, just can obtain the operation conditions of accelerator.The operation conditions that finally will speed up device is shown to accelerator supvr with patterned method.
Electron accelerator voltage failure monitoring system provided by the invention comprises the multiple node voltage detecting devices based on signal condition and digital sample, the meshed network for radio communication and query interface database, multiple node voltage detecting device works alone, communication node in node voltage detecting device and Network Access Point form the meshed network of the radio communication of star topology, node voltage detecting device by this cordless communication network to query interface database transmissions information.
Be control core based on the node voltage detecting device of signal condition and digital sample with ADUC7024, the signal of the voltage adopting AD port number to nurse one's health through modulate circuit, is aided with the work for the treatment of that MSP430F5438 carries out wireless communication protocol.
For the meshed network of radio communication, AP sets up Star Network by the wireless communication unit in relevant communications protocol and voltage-level detector.In statistics electron accelerator, the information of each key node voltage, provides voltage node data for the data base call of host computer.
Host computer database carries out the typing of complete information to the information of voltage of key node, complete database record and safeguard work, and with Network Access Point telecommunication, to reach the work dynamically updating database information in real time.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
First the voltage signal of key node nurses one's health the voltage sample scope of 0-3.3V through signal conditioning circuit.12 ADC that the upper chip of ADUC7026 carries sample to the voltage signal after conditioning.First, Network Access Point utilizes serial ports of computers to obtain wireless data.After this, access point data preparation is unpacked after by being sent to database.The voltage that database management system software will speed up device key node by the data stored is presented on screen in the mode of icon.
Fig. 1 shows the structure of the electron accelerator voltage failure monitoring system based on Internet of Things that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows:
Electron accelerator voltage failure monitoring system comprises: database 3, communication node network 2 and n the voltage-level detector 1 for measuring n tested point voltage respectively;
Wherein communication node network 2 is stelliform connection topology configuration, is made up of n communication node unit and a network access point element, and n communication node unit is connected with network access point element by the mode of radio communication;
The input end of n voltage-level detector 1 connects n voltage tested point in accelerator respectively, and gather the voltage of tested point, the output terminal of n voltage-level detector 1 is connected with n communication node unit respectively,
Communication node network more than 2 node voltage detecting device is directly connected with voltage tested point in accelerator, node voltage detecting device connects and composes stelliform connection topology configuration by the AP of electromagnetic wave and radio communication simultaneously, each accelerator has an independent AP for the information of voltage of aggregation node voltage-level detector, be connected with host computer by netting twine, host computer is read these information by netting twine and is stored and calls.
Voltage-level detector 1 comprises voltage conditioning sample circuit, by signal condition sample circuit in order to survey key node in electron accelerator voltage and by voltage signal digitizing, the structure of voltage conditioning sample circuit as shown in Figure 2, comprises the first operational amplifier U1, the second operational amplifier U2, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1 and electric capacity C2, the input end of signal condition sample circuit is used for being connected with voltage tested point, the positive input of the first operational amplifier U1 received by the bleeder circuit be composed in series through resistance R1 and resistance R2, the output terminal of the first operational amplifier U1 is connected with reverse input end and forms voltage follower circuit, the output terminal of the first operational amplifier U1 is connected with resistance R3, resistance R3 is connected with the positive input of the second operational amplifier U2 by resistance R4, resistance R3 also receives ground through electric capacity C2 series connection, the output termination reverse input end of the second operational amplifier U2 forms negative feedback, the end formation feedback that is connected in series that the output terminal of the second operational amplifier U2 is also connected to resistance R3 and resistance R4 by electric capacity C1 completes frequency screening.The higher voltage transitions of node is can for the low amplitude value voltage signal of sample circuit process by electric resistance partial pressure by this circuit, and by operational amplifier, output voltage being amplified in the input voltage range of digitial controller AD port, output voltage range controls the scope at 0-3.3V.The AD sample port receiving digitial controller through the voltage signal amplified exported.
Digital signal after sampling is delivered to communication node through communication interface.The communication module of each voltage measurement node communicates with convergent point, does not communicate each other, forms star-like communication network.Communications subsystem have employed the media access control protocol of contention type, utilizes wireless communication module LSDRF43010M01 to carry out MANET.And formulated the collision algorithm and frame format that meet its own system demand.First access point is by the information of the data acquisition node of communication node, is peer distribution mailing address, after obtaining all communication node information, and communication networking success.Because n communication node unit wants a public channel to communicate with Network Access Point, for ensureing not interfere with each other the problem that just need manage conflict each other, being employed herein the media access control protocol of self-ordained a kind of contention type, comprising the steps:
(1) each communication module first carries out primary carrier monitoring before transmitting, if now channel idle, then the time that random delay one section is shorter carries out primary carrier monitoring again, if now channel is still idle, so can think that channel does not disturb in this time period, can transmission frame data;
(2) first each communication node sends the node location information of oneself, and Network Access Point is to the communication node allocate communications address of diverse location, and this stage terminates rear networking success;
(3) communication node sends the Real-Time Monitoring information of voltage, comprise information of voltage and sampling time information, judge the physical location of communication node by mailing address after Network Access Point receives packet thus be supplied to host computer database information of voltage, node location information and temporal information.
The communication data that Network Access Point is sent for converging lower floor's voltage sense node.After this, access point is sent to database by LAN (Local Area Network) after data preparation being unpacked.Host computer database acquisition these data after by these data storings, application program retrieves desired data in these data stored, by retrieving these sampled datas and positional information, through carrying out match cognization with the data under the nominal situation stored in a database, thus obtain work and the failure message of accelerator.The work of these accelerators and failure message are presented to the supvr of accelerator by the graphical topological diagram of an accelerator.The method provides friendly inquiry control inerface and the topological diagram of accelerator, complete the detection to diverse location node voltage, and the judgement of accelerator work and fault.And AP can be connected with the TCP that node voltage information database sets up reliable and stable transmission by LAN (Local Area Network), carries out the automatically and dynamically updating of database interior joint information of voltage.The voltage data sent from convergent point stores by the software containing database manipulation of host computer, simultaneously according to the interactive information that human-computer interaction interface obtains, for user provides the node voltage topological diagram of electron accelerator key node information of voltage, simultaneously, user also by the historical data of interactive interface query node voltage, for the fault diagnosis in later stage provides Data support.The most widely used MySQL database of increasing income in voltage signal data storehouse, for leading subscriber provides friendly interface, make administrator can understand the operation conditions of accelerator clearly, and set up reliable and stable TCP by LAN (Local Area Network) with the Network Access Point (AP) of each accelerator and be connected, without the need to manual intervention process, dynamically update the information of voltage of each node in real time.Real realization is to the Real-Time Monitoring of key node voltage in electron accelerator.
Instant invention overcomes the defect of voltage detecting system in conditional electronic irradiation accelerator, be a kind of stable, reliable, abundant information, use flexibly and can the monitoring system of electron accelerator key node voltage of remote monitoring.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a voltage failure monitoring system for electron accelerator, is characterized in that, comprising: communication node network (2), database (3) and n the voltage-level detector (1) for measuring n tested point voltage respectively;
Described communication node network (2) forms stelliform connection topology configuration by n communication node unit and a network access point element, and n communication node unit is connected with described network access point element by the mode of radio communication; Described network access point element is connected with described database (3) by netting twine;
The input end of n voltage-level detector (1) is respectively used to connect n voltage tested point in accelerator, and gather the voltage of tested point, the output terminal of n voltage-level detector (1) is connected with n communication node unit respectively;
During work, the relative voltage of n voltage-level detector (1) Real-time Collection n voltage tested point, respectively the relative voltage of tested point is sent to network access point element by the mode of radio communication by n communication node unit, the relative voltage of each tested point and the positional information of each tested point are sent to database by network access point element; The Voltage Fault Status of accelerator is obtained according to the data in database and the fault state data that presets.
2. voltage failure monitoring system as claimed in claim 1, it is characterized in that, described voltage-level detector (1) comprises voltage conditioning sample circuit, for measuring the voltage of key node in electron accelerator and by voltage signal digitizing, obtaining the relative voltage of tested point.
3. voltage failure monitoring system as claimed in claim 2, is characterized in that, described voltage conditioning sample circuit comprises the first operational amplifier U1, the second operational amplifier U2, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1 and electric capacity C2;
The input end of sample circuit is nursed one's health in one end of described resistance R1 as described voltage, the other end of described resistance R1 is connected to the normal phase input end of described first operational amplifier U1, and the other end of described resistance R1 is also by described resistance R2 ground connection;
The reverse input end of described first operational amplifier U1 is connected to the output terminal of described first operational amplifier U1, and the output terminal of described first operational amplifier U1 is connected to the normal phase input end of described second operational amplifier U2 by the resistance R3 that is sequentially connected in series and resistance R4;
The inverting input of described second operational amplifier U2 is connected to the output terminal of described second operational amplifier U2, and the output terminal of described second operational amplifier U2 nurses one's health the output terminal of sample circuit as described voltage;
What one end of described electric capacity C1 was connected to described resistance R3 and described resistance R4 is connected in series end, and the other end of described electric capacity C1 is connected to the output terminal of described second operational amplifier U2;
One end of described electric capacity C2 is connected to the normal phase input end of described second operational amplifier U2, the other end ground connection of described electric capacity C2.
4. a voltage failure monitoring method for electron accelerator, is characterized in that, comprise the steps:
S1: at key point distributed arrangement n node to be measured of electron accelerator; Described key point refers to position and the high failure rate point of easy high voltage arc in accelerator;
S2: the relative voltage measuring each node to be measured, and by the mode of radio communication, voltage measurement data is sent to Network Access Point;
S3: the information of voltage and its positional information that are obtained each node by Network Access Point, and by these information stored in database;
S4: by the Real-time Monitoring Data in process database and the fault state data pre-deposited, judge the working condition of accelerator, and the operation conditions that will speed up device shows with patterned method.
5. voltage failure monitoring method as claimed in claim 4, is characterized in that, n node to be measured communicates with the public channel of Network Access Point.
6. voltage failure monitoring method as claimed in claim 5, is characterized in that, n node to be measured communicates with adopting the media access control protocol of contention type between Network Access Point, is specially:
(1) each communication node unit first carries out primary carrier monitoring before transmitting, if now channel idle, the time that then random delay one section is shorter carries out primary carrier monitoring again, if now channel is still idle, so can think that channel does not disturb in this time period, can transmission frame data;
(2) each communication node unit sends the node location information of oneself, and Network Access Point is to the communication node unit allocate communications address of diverse location, and this stage terminates rear networking success;
(3) communication node unit sends the Real-Time Monitoring information of voltage, judges the physical location of communication node unit thus be supplied to database information of voltage, node location information and temporal information after Network Access Point receives packet by mailing address.
7. voltage failure monitoring method as claimed in claim 6, described Real-Time Monitoring packets of information is containing information of voltage and sampling time information.
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| CN109739197A (en) * | 2019-01-15 | 2019-05-10 | 广东石油化工学院 | A kind of multi-state failure prediction method of chemical spent material processing equipment |
| CN109922592A (en) * | 2017-12-13 | 2019-06-21 | 中国科学院大连化学物理研究所 | Interlock System For Personal Radiation Safety device and method is monitored online in electron energy threshold value |
| CN110470931A (en) * | 2019-08-09 | 2019-11-19 | 西北核技术研究院 | A kind of measurement method of the radiosensitive parameter of operational amplifier |
| CN111077424A (en) * | 2019-02-01 | 2020-04-28 | 上海联影医疗科技有限公司 | Method, device and equipment for detecting ignition position of high-voltage generator |
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| CN105898978A (en) * | 2016-04-01 | 2016-08-24 | 华中科技大学 | Insulated core transformer type electronic irradiation accelerator installation process |
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| CN109922592A (en) * | 2017-12-13 | 2019-06-21 | 中国科学院大连化学物理研究所 | Interlock System For Personal Radiation Safety device and method is monitored online in electron energy threshold value |
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| CN109739197A (en) * | 2019-01-15 | 2019-05-10 | 广东石油化工学院 | A kind of multi-state failure prediction method of chemical spent material processing equipment |
| CN111077424A (en) * | 2019-02-01 | 2020-04-28 | 上海联影医疗科技有限公司 | Method, device and equipment for detecting ignition position of high-voltage generator |
| CN111077424B (en) * | 2019-02-01 | 2022-10-14 | 上海联影医疗科技股份有限公司 | Method, device and equipment for detecting ignition position of high-voltage generator |
| CN110470931A (en) * | 2019-08-09 | 2019-11-19 | 西北核技术研究院 | A kind of measurement method of the radiosensitive parameter of operational amplifier |
| CN110470931B (en) * | 2019-08-09 | 2021-05-25 | 西北核技术研究院 | Method for measuring radiation sensitive parameters of operational amplifier |
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