CN1091901C - Large rotating machine set on line state monitoring and fault detecting system - Google Patents
Large rotating machine set on line state monitoring and fault detecting system Download PDFInfo
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- CN1091901C CN1091901C CN 97102397 CN97102397A CN1091901C CN 1091901 C CN1091901 C CN 1091901C CN 97102397 CN97102397 CN 97102397 CN 97102397 A CN97102397 A CN 97102397A CN 1091901 C CN1091901 C CN 1091901C
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Abstract
The present invention relates to a system for monitoring the on-line state and diagnosing faults for a large rotating machine set, which comprises a pretreatment board connected with a key-phase signal and a fast-varying signal, an intelligent key-phase board for controlling the whole cycle sampling, a high-speed data collecting board for collecting a vibration signal, a low-speed data collecting board for collecting a slowly-varying signal, and a collecting board for monitoring a switching value signal, wherein all the boards are connected with a lower computer. The lower computer is used for collecting and monitoring data of the running state of a machine set in real time by a high-speed intelligent monitoring system. An upper computer is used for processing on-line signals and diagnosing faults, and the high-speed communication between the upper computer and the lower computer is realized by a network card. The present invention can collect and monitor the parameters of vibration, displacement, temperature and technique and can diagnose faults for the machine set.
Description
The present invention relates to a kind of large rotating machine set on line state monitoring and fault diagnosis system.
Along with quick development of modern science and technology, all kinds of rotation units (as equipment such as steam turbine, generator, fan blower, compressors) maximization day by day, high speed, complicated, the mechanical efficiency and the automatization level of unit all improve a lot.If these equipment have an accident in operational process, not only expensive equipment own causes damage, and causes continuously the big interruption of producing, and can bring enormous economic loss and abominable social influence.If, will avoid or reduce the generation of this serious consequence in addition on-line monitoring and the diagnosis of running statuses such as the vibration of large rotating machine group, temperature, pressure.
For the large rotating machine group, traditional secondary instrument monitoring can not have been satisfied the needs of reality.From sixties end, abroad begin with computing machine the status monitoring of large-scale unit and the research of fault diagnosis, and developed DDM system, ADRE system as U.S. BN company; The TEM system of Power Generation Section, Britain center; The MHMS system of MIT and the MDC system of US Westinghouse company etc.China also begins to develop and study in the eighties, and Harbin Institute of Technology proposes fuzzy mathematics theory and implements unit vibration analysis and fault diagnosis, has developed the MMMD system; RMMDS system etc. has been developed in the Shanghai Communications University, Xi'an.But in monitoring system to single unit, add some data acquisition function pieces, front end signal conditioning functions piece, digital quantity input function piece and analog quantity output function piece etc. with single computer mostly, match with monitoring software again, finish the tasks such as data acquisition, data processing, data presentation and storage, data analysis and fault diagnosis to the running status of unit, its burden is very heavy.Because for accurate fault technology, will obtain a degree of confidence than higher diagnostic result, be to need a large amount of analytical calculations, it is inappropriate obviously finishing heavy task like this with a computing machine.Generally all can only accomplish initial analysis to signal, and, just can only reduce signals collecting density for the situation that requires to gather a large amount of signals, do not accomplish unit is monitored continuously, might lose some important information, its real-time has also reduced for on-line system simultaneously.
The objective of the invention is: design a kind of upper and lower industrial control microcomputer system, realize high-speed communication by network interface card therebetween.Bear the real-time data acquisition and the supervision of operating states of the units by high speed, intelligent monitor system with the next industrial control microcomputer; With the large rotating machine set on line state monitoring and the fault diagnosis system of responsible online signal Processing of upper industrial control microcomputer and fault diagnosis, the system of this two-shipper division of labour with individual responsibility, parallel organization can solve the problem that exists in the background technology.
The technical solution used in the present invention is that it comprises:
1) the Signal Pretreatment plate that is connected with 1 road key signal and 12 tunnel (extendible as required) fast changed signal;
2) Signal Pretreatment plate, it comprises amplification and rectification circuit, the AC and DC separation circuit, tracking filter circuit and amplifying circuit, wherein: the key signal in the rotating shaft is via suitable demodulation circuit, every straight, comparison, amplifying circuit, is connected with the intelligent key phase-plate behind photoelectric isolating circuit and the shaping circuit; Be installed in each measuring point is produced by current vortex sensor on the rotation unit vibration, displacement fast changed signal, one tunnel direct current in the AC and DC separation circuit is by the current subtraction circuit, behind the subtraction circuit of another road in the AC and DC separation circuit, be connected to the tracking filter circuit, be connected with first technical grade data acquisition board behind the amplifying circuit; The pulse input end of tracking filter circuit is connected with the programmable counter output terminal of intelligent key phase-plate;
3) intelligent key phase-plate, it comprises parallel interface, single chip microcomputer, program storage, first programmable counter, second programmable counter, wherein: key signal is connected with single chip microcomputer through the amplification and rectification circuit of Signal Pretreatment plate; The next industrial computer is connected with single chip microcomputer through parallel interface; Single chip microcomputer respectively with program storage, first programmable counter, second programmable counter connects, and the output of first programmable counter connects first technical grade data acquisition board, but the output of the second coder counter connects the tracking filter circuit in the Signal Pretreatment plate;
4) second technical grade data acquisition board and the 3rd technical grade data acquisition board that is connected with 46 tunnel (extendible as required) tempolabile signal;
5) 1 road self-test signal is connected with the 3rd technical grade data acquisition board with first, second respectively;
6) the switching value signal acquiring board that is connected with 24 tunnel (extendible as required) switching value signal, the switching value signal acquiring board, it comprises photoelectric isolating circuit, shaping circuit, peripheral circuit, single chip microcomputer, parallel communication interface, wherein: the switching value signal is through photoelectric isolating circuit, then through shaping circuit, peripheral circuit, single chip microcomputer, the parallel communications mouth is connected with the next industrial computer.
7) first, second, the 3rd technical grade data acquisition board is connected with the next industrial control microcomputer respectively with the switching value signal acquiring board;
8) the next industrial control microcomputer one end is connected with upper industrial control microcomputer through first network interface card, second network interface card, first end be connected by first display, first keyboard and the input-output device that first mouse is formed;
9) upper industrial control microcomputer one end is connected with digital signal processing, analytic system (DSP hardware), and the other end is connected with the input-output device that second display, second keyboard, second mouse and printer are formed.
Whole monitoring and diagnosis system is made up of the upper and lower industrial control microcomputer, slave computer by at a high speed, intelligent monitor system bears the real-time data acquisition and the supervision of operating states of the units, system also has self-checking function.Host computer is responsible for having digital signal processing (DSP hardware) analytic system, online signal Processing and fault diagnosis, and the division of labour with individual responsibility of upper and lower industrial control microcomputer, concurrent working realizes high-speed communication by network interface card between them.For obtaining the higher width of cloth, phase precision, the status data of slave computer is gathered fore device and designed the intelligent detection and control system of being made up of single-chip microcomputer in signal spectral analysis, and is integer-period sampled to realize frequency conversion.For improving the real-time of system, host computer has been set up the digital signal processing DSP analytic system of hardware.Whole monitoring and diagnosis system can provide true, real-time presence state data and the online reliable analysis and the comprehensive diagnos result of fault for monitoring unit operation.
The present invention compares with background technology, and the useful effect that has is:
1. solved the separate unit machine and born too heavy contradiction, more be adapted to the comprehensive on-line data acquisition and the real-time state monitoring of unit at multi-channel signal acquiring and in analyzing;
2. realized the relatively independent of data acquisition and real-time state monitoring and online dynamic signal analysis and fault diagnosis, concurrent working;
3. under the cooperation of high-speed data acquisition plate and intelligent key phase-plate, can be to 12 the tunnel (or more multichannel) vibration, displacement signal carry out high-speed synchronous complete cycle collection of frequency conversion accurately and high speed data transfer;
4. the low pass tracking filter that advanced switching capacity filter is formed is adopted in the conditioning of vibration, displacement signal, has avoided aliasing;
5. system's various acquisition modes that can automatically switch, and possess " black box " function;
6. system has adopted IPC and technical grade data acquisition board, has guaranteed the reliability of system effectively, has improved the performance of system greatly;
7. employing modular design, it is convenient that system is soft, hardware capability expands.
Therefore, it is very suitable for equipment such as all kinds of large rotating machine groups such as steam turbine, generator, fan blower, compressor, realization is to vibration, displacement fast changed signal and temperature, and collection, supervision and the resultant fault of tempolabile signal such as pressure and technological parameter and switching value signal are diagnosed.
Description of drawings:
Fig. 1, overall circuit structured flowchart of the present invention;
Fig. 2, Signal Pretreatment plate circuit structure block diagram;
Fig. 3, intelligent key phase-plate circuit structure block diagram;
Fig. 4, switching value signal acquiring board circuit structure block diagram;
Key signal modulate circuit figure in Fig. 5, the Signal Pretreatment plate circuit;
Vibration signal modulate circuit figure in Fig. 6, the Signal Pretreatment plate circuit;
Fig. 7, intelligent key phase-plate circuit structure schematic diagram;
Fig. 8, switching value signal acquiring board circuit structure schematic diagram.
Below in conjunction with accompanying drawing, provide details of the present invention by description to embodiment.
As shown in Figure 1 and Figure 2,1 road key signal 1 in the rotating shaft is via the suitable demodulation circuit 2a in the Signal Pretreatment plate 2
1, every straight, comparison, amplifying circuit 2a
2, photoelectric isolating circuit 2a
3, shaping circuit 2a
4After, be input to intelligent key phase-plate 3; Be installed in each measuring point is produced by current vortex sensor on the rotation unit 12 tunnel vibrations, displacement fast changed signal, via direct current by circuit 2b
1, subtraction circuit 2b
2The AC and DC separation circuit 2b that forms, tracking filter circuit 2c behind the amplifying circuit 2d, is input to PCL-1800 technical grade data acquisition board 8, and tracking filter circuit 2c also is connected with the programmable counter 3e of intelligent key phase-plate 3.As Fig. 2, shown in Figure 3, key signal 1 is connected with 8098 single-chip microcomputer 3b through the amplification and rectification circuit 2a of Signal Pretreatment plate 2; Single-chip microcomputer 3b is connected with EPROM2764 program storage 3c respectively, 8253 programmable counter 3d connect and are connected with 8253 programmable counter 3e, the output of 8253 programmable counter 3d connects PCL-1800 technical grade data acquisition board 8, and the output of programmable counter 3e connects the tracking filter circuit 2c in the Signal Pretreatment plate 2.As shown in Figure 1, tempolabile signal 5 (vibration peak 12 tunnel, bearing temperature 17 tunnel, technological parameter 17 tunnel) connects PCL-813 technical grade data acquisition board 9 and PCL-813 industrial data collection plate 10; 1 road self-test signal 6 is connected with data acquisition board 8,9,10 respectively.As Fig. 1, shown in Figure 4,24 way switch amount signals 7 are via photoelectric isolating circuit 11a, shaping circuit 11b, and peripheral circuit 11c, 8098 single chip microcomputer 11d, the switching value signal acquiring board 11 that parallel communication interface 11e forms is connected with the next industrial computer 20.As shown in Figure 1, data acquisition board 8,9,10 and switching value signal acquiring board 11 respectively with the next industrial computer 20 1 ends through network interface card 19 (NE2000), network interface card 20 (NE2000) and upper industrial computer 13 (486D * 166 internal memories: 8MB HDD:540MB) be connected, the other end be connected by display 21, keyboard 22 and the input-output device that mouse 23 is formed; Upper industrial computer 13 1 ends are connected with hardware digital signal processing DSP analytic system 12, the other end be connected by display 14, keyboard 15, mouse 16 and the input-output device that printer 17 is formed.
As shown in Figure 5, used a slice integrated operational amplifier U4:LF347 in the processing of key signal.1 road key signal 1 is from the 3 pin input of the integrated operational amplifier U4:A of LF347 in the rotating shaft, buffering through U4:A is exported from 1 pin of U4:A, carry out after direct sum filtering through capacitor C 4 and resistance R 25, from by U4:B and resistance R 26, the 5 pin input of U4:B in the amplifying circuit that R27 forms, after amplifying, export by 7 pin of U4:B, again from by U4:C and resistance R 28, the 9 pin input of U4:C in the comparator circuit that R29 and potentiometer W4 form, the output of 8 pin, this moment, signal was processed into square wave, amplify via triode T1 again after resistance R 30 outputs, from by photoelectric isolated chip TIP127 and resistance R 31, the 3 pin input of the photoelectric isolated chip in the photoelectric isolating circuit that R32 forms, export by 5 pin, after two 74LS14 phase inverter U5:A carry out shaping, be connected again with intelligent key phase-plate 3.The Signal Pretreatment plate is that 12 tunnel vibrations, displacement signal are carried out pre-service as shown in Figure 6, utilization 3 two LF347 operational amplifier U1, U3 and a slice MF10 low pass tracking filter U2 in processing procedure.Be installed in 12 tunnel vibrations that each measuring point is produced by eddy current sensor on the rotation unit, displacement fast changed signal 4 (is example with one tunnel) is divided into two-way through buffering from the 3 pin input of LF347 integrated operational amplifier U1:A after the output of 1 pin, one the tunnel enters by capacitor C 1 through resistance R 2, C2, resistance R 5, R3, the direct current that R4 and U1:B form is by the 7 pin output of circuit from U1:B, the direct current composition of output is divided into two-way, wherein one tunnel another road output signal with the pin of U1:A enters by resistance R 1, R10, R8, the subtraction circuit that R9 and U1:C form is from the 8 pin output of U1:C; Another road output signal of 7 pin of U1:B output enters by U1:D through resistance R 7, U3:A, and the amplifying circuit that resistance R 6, R16, R17, R15 and potentiometer W1, W2 form is from the 1 pin output of the U3:A of this circuit; The Alternating Component of 8 pin of U1:C output is from by a slice low pass tracking filter U2, resistance R 11, R12, R13, the 5 pin input of the U2 of the low pass tracking filter circuit that R14 forms, and the time clock of wave filter is by 10 pin of U2, the input of 11 pin, signal with filtering after by the output of 20 pin of U2, again from by U3:B, resistance R 19, R18, the 5 pin input of U3:B in the amplifying circuit that potentiometer W3 forms, the direct current composition that this AC signal is exported with 1 pin of U3:A after amplifying, respectively through resistance R 21, after R20 does the stack of alternating current-direct current composition, together from by U3:C, U3:D and resistance R 23, after the amplifying circuit that R22 forms amplifies, 9 pin input from U3:C, after amplifying,, at this moment vibrate from the 14 pin output of U3:D, displacement signal through handling, is delivered to PCL-1800 technical grade data acquisition board 8.
As shown in Figure 7, the HSIO mouth of 8098 single-chip microcomputer 3b connects key signal 1 and imports behind amplification and rectification circuit 2a, the 8 bit data bus DB of single chip microcomputer 3b and the data line of EPROM2764 program storage 3c, the A mouth of the data line of 8253 programmable counter 3d, 8253 programmable counter 3e, the data bus of 8255-1 programmable parallel interface chip connects.The AD0 of single-chip microcomputer 3b～AD7 data/address wire is behind the 74LS373 latch, be connected with the least-significant byte address wire of program storage 3c, the address wire A8 of single-chip microcomputer 3b～A12 directly is connected with address wire A8～A12 of program storage 3c, form 13 bit address lines, A13～A15 of single-chip microcomputer 3b meets the A of 74LS138-1 code translator respectively, B, the calculated address decoding of C end, its output Y1 connects the CE end (address is 2000H) of program storage 3C, Y2 connects the CS end (address is 4000H) of programmable counter 3d, Y3 connects the CS end (address is 6000H) of programmable counter 3e, Y4 connects the CS end (address is 6000H) of 8255-1 programmable parallel interface chip, Y5 connects the E end (address is A000H) of 74LS2458 bus transceiver, the A of 8255-1 and 8255-2, B, the C mouth docks mutually, 8255-2, the data line of 8255-3 is connected with the data line of slave computer 20 AJ buses, the A mouth of 8255-3 is connected with the B mouth of eight bus transceivers, the PC7 of 8255-3 is connected with the HI2/04 of single-chip microcomputer 3b, is used to transmit command word and sends interrupt request to single-chip microcomputer 3b.Slave computer 20 AJ bus address lines are after the decoding scheme decoding of 74LS138-2, Sheffer stroke gate 74LS08 and 74LS14 not gate composition, the CS end (I/O address is 360H) of the Y4 termination 8255-3 of 74LS138-2, Y5 connect the CS end (I/O address is 368H) of 8255-2.
The work of intelligent key phase-plate 3 is to carry out under the control of the watchdog routine in being stored in program storage 3C, key signal 1 is introduced from the HSIO mouth of single-chip microcomputer 3b, when the key signal rising edge of a pulse arrives, 3b sends interrupt request to single-chip microcomputer, have no progeny in the response and just note the currency of on-chip timer, when next key and pulse arrival, note the number of times that overflows of timer, promptly can calculate the current rotating speed of rotor by the calculating of software.Speed revolution value writes in two programmable counter 3d, the 3e after being multiply by a coefficient subsequently respectively, two programmable counter 3d, 3e control the frequency of sending pulse according to the numerical value that is written into separately, and they produce the time clock of the external trigger pulse and the low pass tracking filter 2c of PCL-1800 technical grade data acquisition board respectively.Single-chip microcomputer 3b writes 8255-1 programmable parallel interface chip together to the status word of rotating speed and mechanical movement simultaneously, and after the 8255-2 buffering, slave computer 20 can be controlled the working method of intelligent key phase-plate through giving an order to the intelligent key phase-plate by 8255-3.The 74LS138-1 code translator is used for the address decoding in the intelligent key phase-plate plate, and 74LS138-2 is used for the port address decoding of slave computer 20.It carries out Based Intelligent Control by single-chip microcomputer the intelligent key phase-plate, has the control of testing the speed, and integer-period sampled control triggers tracking filter, functions such as Based Intelligent Control acquisition mode.Its effect has strengthened monitoring function, greatly reduces the workload of slave computer, has improved the response speed of system.
As shown in Figure 8, the photoelectric isolating circuit 11a that switching value signal 7 is formed through the TLP521 photoelectric isolated chip carries out photoelectricity to be isolated, again after 74LS14 not circuit 11b shaping, 24 the road insert the A of 8255-1 programmable parallel interface chip simultaneously, B, the C mouth, 8 bit data bus of 8098 single-chip microcomputer 11d and the data line of EPROM2764 program storage, 8255-1, the data line of 8255-2 programmable parallel interface chip links to each other, the data/address bus AD0 of single chip microcomputer 11d～AD7 is after the 74LS373 latches, be connected with the least-significant byte address wire of EPROM2764, A8～A12 of EPROM2764 is connected with the A8～A12 of single-chip microcomputer 11d address wire, form the 13 bit address lines of EPROM2764, single chip microcomputer 11d address wire A13～A15 respectively with the A of 74LS138-1 code translator, B, the C end links to each other, after decoding, its Y1 is connected (address is 2000H) with the CE end of EPROM2764, Y2 is connected (address is 4000H) with the CS end of 8255-1, and Y3 is connected (address is 6000H) with the CS end of 8255-2; The A of 8255-2,8355-3, B, C mouth link to each other respectively and form data buffering, and the data line of 8255-3 is connected with the data line of slave computer 20AJ bus, is used for the parallel communications of slave computer 20 and switching value signal monitoring plate.The address of slave computer 20AJ bus is after the decoding scheme decoding of 74LS138-2 and 74LS08 programmable parallel interface composition, and the CS of the Y4 termination 8255-3 of 74LS138-2 holds (I/O address is 2E0H).
The switching value signal acquiring board is made of one 8098 Single Chip Microcomputer (SCM) system, relay contact is monitored, any path switching signal generation saltus step all can be sent interruption to 8098,8098 states of noting each relay pass to main control microcomputer by parallel interface, and send interruption to main control microcomputer, make system enter " black box " high speed acquisition state.
Be connected by two Novell Netware Lite 2000 network interface cards between host computer 13 and the slave computer 20 and carry out Point-to-Point Data and communicate by letter, owing to utilize the RAMDRIVE technology that core image is file system in slave computer, therefore the function design of exented memory is used in the support to shared file that provides of the shared file service that provides of available Novell Netware and MS-DOS.Virtual disk is added network as network disk, and with its hard disk logical partition that is mapped to the data processing microcomputer, two machines can be realized data communication, make in this way and communicate, not only the speed high reliability is good, and reduces the software programming workload, and installation and use are all very convenient.Can realize data communication, make in this way to communicate that not only the speed high reliability is good, and reduce the software programming workload, installation and use are all very convenient.
Claims (3)
1. large rotating machine set on line state monitoring and fault diagnosis system is characterized in that it comprises:
1) the Signal Pretreatment plate (2) that is connected with 12 road fast changed signals (4) with 1 road key signal (1);
2) Signal Pretreatment plate (2), it comprises amplification, shaping circuit (2a), AC and DC separation circuit (2b), tracking filter circuit (2c) and amplifying circuit (2d), wherein:
A. the key signal in the rotating shaft (1) is via suitable demodulation circuit (2a
1), every straight, comparison, amplifying circuit (2a
2), photoelectric isolating circuit (2a
3) and shaping circuit (2a
4) then be connected with intelligent key phase-plate (3);
B. be installed in each measuring point is produced by current vortex sensor on the rotation unit vibration, displacement fast changed signal (4), one tunnel direct current in AC and DC separation circuit (2b) is by circuit (2b
1), subtraction circuit (2b
2), the subtraction circuit (2b of another road in AC and DC separation circuit (2b)
2) after, being connected to tracking filter circuit (2c), amplifying circuit (2d) back is connected with first technical grade data acquisition board (8), and the pulse input end of tracking filter circuit (2c) is connected with programmable counter (3e) output terminal of intelligent key phase-plate (3);
3) intelligent key phase-plate (3), it comprises parallel interface (3a), single chip microcomputer (3b), program storage (3c), first programmable counter (3d), second programmable counter (3e), wherein:
A. key signal (1) is connected with single chip microcomputer (3b) through the amplification and rectification circuit (2a) of Signal Pretreatment plate (2);
B. the next industrial computer (20) is connected with single chip microcomputer (3b) through parallel interface (3a);
C. single chip microcomputer (3b) respectively with program storage (3c), first programmable counter (3d), second programmable counter (3e) connects, the output of first programmable counter connects first technical grade data acquisition board (8), but the output of the second coder counter (3e) connects the tracking filter circuit (2c) in the Signal Pretreatment plate (2);
4) second technical grade data acquisition board (9) that is connected with 46 road tempolabile signals (5) and the 3rd technical grade data acquisition board (10);
5) 1 road self-test signal (6) is connected with first (8), second (9) and the 3rd (10) technical grade data acquisition board respectively;
6) the switching value signal acquiring board (11) that is connected with 24 way switch amount signals (7), switching value signal acquiring board (11), it comprises photoelectric isolating circuit (11a), shaping circuit (11b), peripheral circuit (11c), single chip microcomputer (11d), parallel communication interface (11e), wherein: switching value signal (7) is through photoelectric isolating circuit (11a), then through shaping circuit (11b), peripheral circuit (11c), single chip microcomputer (11d), parallel communication interface (11e) is connected with the next industrial computer (20).
7) first (8), second (9), the 3rd (10) technical grade data acquisition board and switching value signal acquiring board (11) are connected with the next industrial control microcomputer (20) respectively;
8) the next industrial control microcomputer (20) one ends are connected with upper industrial control microcomputer (13) through first network interface card (19), second network interface card (18), the other end be connected by first display (21), first keyboard (22) and the input-output device that first mouse (23) is formed;
9) upper industrial control microcomputer (13) one ends are connected with hardware digital signal processing, DSP analytic system (12), and the other end is connected with the input-output device that second display (14), second keyboard (15), second mouse (16) and printer (17) are formed.
2. large rotating machine set on line state monitoring according to claim 1 and fault diagnosis system is characterized in that:
1) Signal Pretreatment plate (2):
A. 1 road key signal (1) in the rotating shaft is from the 3 pin input of LF347 integrated operational amplifier U4:A, through the 1 pin output of buffering from U4:A, carry out every directly through capacitor C 4 and resistance R 25, from by U4:B and resistance R 26, the 5 pin input of U4:B in the amplifying circuit that R27 forms, after amplifying, export by 7 pin of U4:B, again from by U4:C and resistance R 28, the 9 pin input of U4:C in the comparator circuit that R29 and potentiometer W4 form, the output of 8 pin, this moment, signal was processed into square wave, amplify via triode T1 again after resistance R 30 outputs, from by photoelectric isolated chip TIP127 and resistance R 31, the 3 pin input of the photoelectric isolated chip during the photoelectricity that R32 forms is isolated, export by 5 pin, after two 74LS14 phase inverter U5:A and U5:B carry out shaping, be connected again with intelligent key phase-plate (3);
B. be installed in each measuring point on the rotation unit, 12 tunnel vibrations by the eddy current sensor generation, displacement fast changed signal (4), introduce from resistance R 24, filtering high-frequency signal wherein after capacitor C 3,3 pin input from LF347 integrated operational amplifier U1:A, being divided into two-way one tunnel through buffering after the 1 pin output enters by capacitor C 1 through resistance R 2, C2, resistance R 5, R3, the direct current that R4 and U1:B form passes through circuit, 7 pin output from U1:B, the flip-flop of output is divided into two-way, wherein one tunnel another road output signal with 1 pin of U1:A enters by resistance R 1, R10, R8, the subtraction circuit that R9 and U1:C form, 8 pin output from U1:C, another road output signal of 7 pin of U1:B enters through resistance R 7, by U1:D, U3:A, resistance R 6, R16, R17, R15 and potentiometer W1, the amplifying circuit that W2 forms, 1 pin output from the U3:A of this circuit, the alternating component of 8 pin of U1:C output is from by a slice low pass tracking filter U2, resistance R 11, R12, R13, the 5 pin input of the low pass tracking filter circuit that R14 forms, and the time clock of wave filter is by 10 pin of U2, the input of 11 pin, signal is exported by 20 pin of U2 after filtering, again from by U3:B, resistance R 19, R18, the 5 pin input of U3:B in the amplifying circuit that potentiometer W3 forms, the flip-flop that this AC signal is exported with 1 pin of U3:A after amplifying, respectively through resistance R 21, R20 is with handing over, after the flip-flop stack, together from by U3:C, U3:D and resistance R 23, after the amplifying circuit that R22 forms amplifies, from the 9 pin input of U3:C, 14 pin from U3:D after amplifying output to PCL-1800 technical grade data acquisition board 8;
2) intelligent key phase-plate (3):
The HSIO mouth of 8098 single-chip microcomputers (3b) connects key signal (1) and imports behind amplification and rectification circuit (2a), the 8 bit data bus DB of single chip microcomputer (3b) and the data line of EPROM2764 program storage (3c), 8253 programmable counters (3d), the A mouth of the data line of 8253 programmable counters (3e), the data bus of 8255-1 programmable parallel interface chip connects, the AD0 of single-chip microcomputer (3b)～AD7 data/address wire is behind the 74LS373 latch, be connected with the least-significant byte address wire of program storage (3c), address wire A8～the A12 of single-chip microcomputer (3b) directly is connected with address wire A8～A12 of program storage (3c), form 13 bit address lines, A13～the A15 of single-chip microcomputer (3b) meets the A of 74LS138-1 code translator respectively, B, the calculated address decoding of C end, its output Y1 connects the CE end of program storage (3C), Y2 connects the CS end of programmable counter (3d), Y3 connects the CS end of programmable counter (3e), Y4 connects the CS end of 8255-1 programmable parallel interface chip, Y5 connects the E end of 7,4LS,245 eight bus transceivers, the A of 8255-1 and 8255-2, B, the C mouth docks mutually, 8255-2, the data line of 8255-3 is connected with the data line of slave computer (20) AJ bus, the A mouth of 8255-3 is connected with the B mouth of eight bus transceivers, the PC7 of 8255-3 is connected with the HI2/04 of single-chip microcomputer (3b), the address wire of slave computer (20) AJ bus is through 74LS138-2, after the decoding scheme decoding that Sheffer stroke gate 74LS08 and 74LS14 not gate are formed, the CS end of the Y4 termination 8255-3 of 74LS138-2, Y5 connect the CS end of 8255-2;
3. switching value signal acquiring board (11):
The photoelectric isolating circuit (11a) that switching value signal (7) is formed through the TLP521 photoelectric isolated chip carries out photoelectricity isolates, again after a 74LS14 not circuit (11b) shaping, 24 the road insert the A of 8255-1 programmable parallel interface chip simultaneously, B, the C mouth, 8 bit data bus of 8098 single-chip microcomputers (11d) and the data line of EPROM2764 program storage, 8255-1, the data line of 8255-2 programmable parallel interface chip links to each other, data/address bus AD0～the AD7 of single chip microcomputer (11d) is after the 74LS373 latches, be connected with the least-significant byte address wire of EPROM2764, A8～A12 of EPROM2764 is connected with the A8～A12 of single-chip microcomputer (11d) address wire, form the 13 bit address lines of EPROM2764, single chip microcomputer [11d] address wire A13～A15 respectively with the A of 74LS138-1 code translator, B, the C end links to each other, after decoding, its Y1 is connected with the CE end of EPROM2764, Y2 is connected with the CS end of 8255-1, Y3 is connected with the CS end of 8255-2,8255-2, the A of 8355-3, B, the C mouth links to each other respectively and forms data buffering, the data line of 8255-3 is connected with the data line of slave computer [20] AJ bus, be used for slave computer (20 with the parallel communications of switching value signal monitoring plate.The address of slave computer (20) AJ bus is after the decoding scheme decoding of 74LS138-2 and 74LS08 programmable parallel interface composition, and the CS of the Y4 termination 8255-3 of 74LS138-2 holds.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97102397 CN1091901C (en) | 1997-01-31 | 1997-01-31 | Large rotating machine set on line state monitoring and fault detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97102397 CN1091901C (en) | 1997-01-31 | 1997-01-31 | Large rotating machine set on line state monitoring and fault detecting system |
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| Publication Number | Publication Date |
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| CN1164705A CN1164705A (en) | 1997-11-12 |
| CN1091901C true CN1091901C (en) | 2002-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 97102397 Expired - Fee Related CN1091901C (en) | 1997-01-31 | 1997-01-31 | Large rotating machine set on line state monitoring and fault detecting system |
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| CN (1) | CN1091901C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337237C (en) * | 2004-11-17 | 2007-09-12 | 浙江大学 | Fault collection and detection apparatus and method |
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| CN108803554A (en) * | 2017-05-04 | 2018-11-13 | 上海电气集团股份有限公司 | A kind of intelligent diagnosing method of generator signal |
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| CN110441063B (en) * | 2019-06-12 | 2021-04-27 | 祝思宁 | Method for monitoring and diagnosing cracks of large high-speed rotor shaft |
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-
1997
- 1997-01-31 CN CN 97102397 patent/CN1091901C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337237C (en) * | 2004-11-17 | 2007-09-12 | 浙江大学 | Fault collection and detection apparatus and method |
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| Publication number | Publication date |
|---|---|
| CN1164705A (en) | 1997-11-12 |
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