CN101436046B - Integrated multichannel synchronous oscillation data acquiring and monitoring and analysis diagnostic device - Google Patents

Abstract

The invention discloses an integrated multi-channel synchronous vibration data acquisition, monitoring and analysis diagnosis device. The data acquisition unit comprises a signal conditioning circuit, an anti-aliasing filtering circuit, a multi-channel synchronous sampling chip, a system control logic unit, a pulse-shaping circuit (16), a phaselocking frequency multiplication chip and a microprocessor CPU, wherein the system control logic unit comprises a channel configuration logic unit, a clock generation logic unit, a rotating speed measurement logic unit, a sampling control logic unit and a frequency divider, and the data acquisition unit (1) is directly connected with a plurality of eddy current vibration displacement sensors, ICP type piezoelectric vibration acceleration sensors or magnetoelectric vibration speed sensors, and has an interface of a single-channel direct-connected eddy-current, photoelectric or magnetoelectric key phase/revolution speed sensor and so on. The CPU core board is connected with a computer or a palm computer through a network and a USB or a serial interface and finishes the data acquisition for monitoring and analysis diagnosis.

Description

Integrated multi-channel synchronous vibration data acquisition and monitoring and analysis diagnostic device

technical field

The invention belongs to the fields of mechanical vibration signal monitoring and equipment failure analysis and diagnosis, and in particular relates to a hand-held, portable and fixed integrated multi-channel synchronous vibration data collection, monitoring, analysis and diagnosis device for mechanical equipment.

Background technique

Modern process industries, such as metallurgy, petrochemical, electric power and other industries, are all composed of extensively coupled equipment groups. The scale is getting larger and larger, and the links between various production links are becoming closer and closer, forming a production chain with overall correlation, and constantly moving towards high efficiency. , high speed, large capacity, high strength, systematization and automation. The functions of the equipment are increasing, the performance indicators are getting higher and higher, and the composition and mechanism are becoming more and more complex. On the one hand, this greatly promotes the improvement of production efficiency. On the other hand, once the equipment fails, not only the loss of the equipment itself, but also the It will cause the production of the entire enterprise to stop, and in severe cases, it will affect the stability and development of the entire national economy. In addition, the failure loss and maintenance costs of many large key equipment in the process industry have also increased significantly. Therefore, it has become the focus of enterprises to improve the safety and reliability of equipment operation through condition monitoring and fault analysis and diagnosis technology, to ensure stable, long-term, high-quality operation of equipment at full load, and to reduce maintenance costs.

Existing equipment status monitoring and fault analysis and diagnosis devices are mainly divided into three categories: one is the status monitoring and alarm device with monitoring instruments as the main body, which can monitor the vibration, temperature, pressure, flow and other information of the equipment online, and According to the artificially set alarm threshold, it will give an alarm prompt to the abnormal monitoring parameters until the interlock stop. The disadvantage is that it lacks the ability to analyze and diagnose faults. Signal processing and fault analysis methods, such as frequency spectrum analysis, waveform analysis, axis trajectory analysis, etc. This type of device is mainly used for inspection of equipment status. The third is an online status monitoring and fault diagnosis device based on an industrial control computer. This type of device integrates the functions of the first two types of devices, and due to the use of computer technology, it can realize intranet-oriented or even Internet-oriented Remote status monitoring and fault analysis and diagnosis.

The published Chinese invention patent "A Portable Vibration Data Acquisition Device and Method Based on Embedded Technology" (application number: 200810055629.0) uses an embedded ARM processor to realize the detection of a single-channel vibration acceleration signal, and through the configured LCD Display screen and keyboard interface provide time-frequency domain analysis function. However, it has only one vibration input channel and the sensor has a single form and lacks the key phase signal input of rotating machinery, which limits its application field, and it is difficult to realize the whole cycle acquisition of vibration signals, which affects the accuracy of its signal analysis. Generally, it is only suitable for non-critical Inspection of equipment.

The published Chinese invention patent "Integrated Vibration Signal Full Cycle Equal Phase High-speed Synchronous Data Acquisition System" (application number: 02145406.X) adopts the form of industrial control computer plus expansion board to realize key phase signal processing and multi-channel vibration High-speed synchronous full-cycle acquisition of signals, but such systems are only suitable for online stationary applications.

Chinese utility model patent "Highly Integrated Portable Vibration Signal Processing Device" (Patent No.: 200520050843.9) realizes the acquisition and processing of multi-channel vibration signals in the form of a notebook computer plus a data acquisition device, but it does not consider the key phase signal of the rotating machine processing, which limits the scope of application.

Chinese utility model patent "A Portable Vibration Tester" (Patent No.: 86200213U) adopts analog circuit technology to realize single-channel vibration measurement with single function.

Contents of the invention

The purpose of the present invention is to provide a hand-held, portable and fixed integrated multi-channel synchronous vibration data acquisition, monitoring and analysis diagnostic device for mechanical equipment, which overcomes the shortcomings of existing products or systems. In particular, it is equipped with a dedicated interface data acquisition unit that is directly connected to multiple sensors and has a single channel that can be directly connected to the key phase/speed signal input of various sensors such as eddy current, photoelectric or magnetoelectric.

The present invention is an integrated multi-channel synchronous vibration data acquisition and monitoring and analysis diagnostic device is composed of a data acquisition unit 1 and a computer or palmtop computer 2, the two are interconnected through a network, USB or RS-232C serial communication interface, and the data acquisition unit 1 It can connect input signals from multiple vibration sensors, and provide single-channel key phase/speed signal input and power output of different types of sensors.

A synchronous vibration data acquisition device, the data acquisition unit includes a signal conditioning circuit, an anti-aliasing filter circuit, a multi-channel synchronous sampling chip, a system control logic unit, a pulse shaping circuit 16, a phase-locked frequency multiplication chip and a microprocessor, and the system control logic unit 14 includes channel configuration logic, clock generation logic, rotational speed measurement logic, sampling control logic units and a frequency divider. The data acquisition unit 1 performs conditioning and generation of external key phase/rotational speed input signals through its internal pulse shaping circuit 16 The standard TTL logic signal is connected to the internal speed measurement logic 143 of the system control logic 14 on the one hand to complete the real-time detection of the speed cycle, and on the other hand is connected to the phase-locked multiplier composed of the phase-locked frequency multiplier chip 17 and the frequency divider 145. The frequency circuit realizes the phase-locked frequency multiplication of the key-phase pulse and outputs it to the vibration sampling control logic 144 for providing the whole cycle synchronous sampling pulse of the vibration signal. The external multi-channel vibration input signal is processed by the signal conditioning circuit 11 inside the data acquisition unit 1 and then connected Enter the anti-aliasing filter circuit 12, the output processed by the anti-aliasing filter circuit 12 is connected to the multi-channel synchronous sampling chip 13 on the expansion bus of the CPU core board, and the clock generation logic 142 inside the system control logic 14 provides anti-aliasing filtering The cut-off frequency control clock required by the circuit 12 realizes the full cycle synchronous acquisition of the multi-channel vibration input signal under the common control of the sampling control logic 144 inside the system control logic 14 of the CPU core board 18 and the system control logic 14 connected to its expansion bus , the data acquisition unit 1 built-in DC/DC power supply 15 provides the power required by the data acquisition unit 1, and can supply power for external vibration sensors, key phase/speed sensors, and the CPU core board 18 communicates through the network, USB or RS-232C serial The interface is interconnected with the computer or the handheld computer 2. On the one hand, it receives the sampling control parameters and sensor configuration information from the computer or the handheld computer 2 to complete the relevant data collection function; on the other hand, it sends the collected data to the computer or the handheld computer 2 for supply. Data processing and fault analysis and diagnosis.

The conditioning circuit is composed of sensor power supply circuit 111, parallel vibration signal DC component separation circuit 112 and vibration signal AC component separation circuit 113, AC component program-controlled amplifying circuit 114, AC component primary integration circuit 115 and secondary integration circuit 116 and output signal Selection circuit 117 is formed, vibration signal DC component separation circuit 112 is a first-order low-pass filter circuit, vibration signal AC component separation circuit 113 is a first-order high-pass filter circuit, and the output of DC component separation circuit 112 and AC component separation circuit 113 is connected to AC component The program-controlled amplifier circuit 114 is then connected with the AC component primary integration circuit and the secondary integration circuit. The AC component program-controlled amplifier circuit uses an integrated program-controlled amplifier chip. The AC component primary integration circuit 115 and the AC component secondary integration circuit 116 use high-precision zero-drift calculations. Amplifier LTC2052, the output signal selection circuit 117 passes through a 4:1 multiplexer.

The computer or palmtop computer 2 only needs to select one of the three in the industrial control computer, notebook computer or PDA palmtop computer during specific implementation, and the corresponding fixed, portable or handheld computer can be jointly constructed with the data acquisition unit 1 Multi-channel synchronous vibration data acquisition, monitoring, analysis and diagnosis device for mechanical equipment.

Compared with the prior art, the present invention has the advantages of:

(1) The data acquisition unit 1 can be directly connected to multiple eddy current vibration displacement sensors, ICP piezoelectric vibration acceleration sensors or magnetoelectric vibration velocity sensors, and has a single channel that can be directly connected to eddy current, photoelectric or magnetoelectric sensors. In addition, the data acquisition unit 1 has a built-in power supply for various sensors, including -24V eddy current sensor power supply, +12V photoelectric key phase/speed sensor power supply, +24V piezoelectric vibration Acceleration sensor constant current power supply, in which the piezoelectric vibration acceleration sensor constant current power supply can be turned on or off by software program.

(2) The data acquisition unit 1 has a built-in vibration signal conditioning circuit, which can realize the AC/DC separation of the vibration sensor input signal, the program-controlled amplification of the AC signal, and the primary or secondary integration of the AC signal. The program-controlled amplification of the AC signal can be selected as 1, 2, 5, 10, 20, 50, 100 seven levels, the signal conditioning mode can be set by software programming.

(3) The data acquisition unit 1 has a built-in key phase/speed signal processing circuit, which can measure the speed cycle of each revolution in real time and perform frequency multiplication on the key phase signal through a phase-locked frequency multiplication circuit to provide the sampling control required for synchronous acquisition of the entire cycle of the vibration signal The multiples of pulse and frequency multiplication can be selected by software as 8, 16, 32, 64, 128, 256, 512, and 1024 times, and the multiples can be switched instantaneously without waiting. When there is no key phase/speed signal input, the data acquisition unit 1 can generate the sampling pulse required for synchronous sampling by the sampling frequency timer provided by its internal programmable logic device (CPLD) according to software programming.

(4) The data acquisition unit 1 realizes the system control logic 14 by a single-chip programmable logic device (CPLD) and adopts a single-chip multi-channel synchronous sampling chip 13 to complete the synchronous acquisition of the whole cycle of the vibration signal, which simplifies the system structure and realizes data acquisition The miniaturization of the unit improves its portability.

(5) The data acquisition unit 1 adopts the CPU core board as its main control module. The CPU core board has a built-in program memory, data memory, network interface, RS-232C serial interface, etc., and is interconnected with peripheral devices through its expansion bus, which is convenient For system upgrade and maintenance, the CPU core board can choose either the X86 series embedded CPU core board or the ARM series embedded CPU core board.

(6) The data acquisition unit 1 adopts the integrated design of hand-held, portable and fixed, and provides a variety of communication interfaces including network, USB device port and RS-232C, and can be directly connected to industrial control computers, notebook computers or PDAs Computer, flexible configuration. For handheld applications, you can choose the mode of data acquisition unit plus PDA handheld computer to realize the inspection of the equipment, and use the simple data analysis software provided by the PDA handheld computer to analyze and judge the equipment status and perform on-site dynamic balance; for portable In application occasions, you can choose the mode of data acquisition unit plus notebook computer, and analyze and diagnose equipment failures and on-site dynamic balance through the software inside the notebook computer; for fixed applications, you can choose the mode of data acquisition unit processing industry control computer to realize On-line continuous monitoring and analysis and diagnosis of equipment status.

Description of drawings

Figure 1 is a block diagram of the overall structure of an integrated multi-channel synchronous vibration data acquisition, monitoring, analysis and diagnosis device.

Figure 2 is a functional block diagram of a programmable logic device.

Figure 3 is a schematic diagram of the signal conditioning circuit.

Figure 4 is a schematic diagram of the anti-aliasing filter circuit.

Figure 5 is a circuit schematic diagram of multi-channel synchronous sampling AD chip.

Figure 6 is a schematic diagram of the programmable logic device circuit.

Figure 7 is a schematic diagram of the pulse shaping circuit.

Figure 8 is a schematic diagram of the phase-locked frequency multiplication circuit.

Fig. 9 is a schematic diagram of the interface of the CPU core board and the communication circuit.

Figure 10 is a schematic diagram of the power supply circuit of the device.

Figure 11 is a workflow diagram of the data acquisition application software.

Figure 12 is a functional block diagram of vibration signal monitoring and analysis diagnostic software.

Detailed ways

This embodiment is an integrated six-channel synchronous vibration data acquisition, monitoring, analysis and diagnosis device. Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in accompanying drawing 1, present embodiment is made up of data acquisition unit 1 and computer or palmtop computer 2, and data acquisition unit 1 is connected with computer or palmtop computer 2 through its built-in network, USB device port or RS-232C serial interface . The data acquisition unit 1 includes a signal conditioning circuit 11, an anti-aliasing filter circuit 12, a multi-channel synchronous sampling chip 13, a system control logic 14, a DC/DC power supply 15, a pulse shaping circuit 16, a phase-locked frequency multiplication chip 17, and a CPU core board 18 . The signal conditioning circuit 11, the anti-aliasing filter circuit 12, the multi-channel synchronous sampling chip 13, and the CPU core board 18 are connected in sequence, and the channel configuration logic 141, the clock generation logic 142 and the sampling control logic 144 inside the system control logic 14 are respectively connected with the signal conditioning circuit 11. The anti-aliasing filter circuit 12 and the multi-channel synchronous sampling chip 13 are interconnected to control the signal conditioning mode, anti-aliasing filter cut-off frequency and multi-channel synchronous sampling, and the pulse shaping circuit 16 regulates the externally connected key phase/speed signal Generate a standard TTL pulse signal of 0-5V, on the one hand, connect to the speed measurement logic 143 and sampling control logic 144 inside the system control logic 14, to complete the real-time detection of rotating machinery speed and synchronous control of vibration signal sampling, on the other hand, connect to The phase-locked frequency multiplier chip 17 carries out the phase-locked frequency multiplier, and the frequency divider circuit required by the phase-locked frequency multiplier chip 17 is realized by the frequency divider 145 inside the system control logic 14, and the DC/DC power supply 15 provides the required components of this embodiment. A DC power supply.

As shown in accompanying drawing 2, the system control logic 14 is connected with the microprocessor CPU core board 18 through the bus and port decoding logic 146 provided with inside it, and the channel configuration logic 141 unit includes sampling control signal selection port 1410, acceleration sensor power supply Control port 1411 and gain serial control port 1412, sampling control signal selection port 1410 outputs 12 control signals SEL0~SEL11, each two signals correspond to a vibration channel, and are used to select the AC component and AC component of the vibration channel signal respectively. The primary integral output, the secondary integral output of the AC component or the DC component of the vibration channel signal are used for sampling, the acceleration sensor power supply control port 1411 is used to control the opening or closing of the constant current power supply of the 6-way vibration acceleration sensor, and the gain is serially controlled The port 1412 is used to control the amplification factor of the AC component of the 6-channel vibration signal. The sampling control logic 144 includes an AD control logic 1440, a sampling frequency timer 1441, and a sampling trigger pulse selection logic 1442. The AD control logic 1440 provides the multi-channel synchronous sampling chip 13. required sampling control signal, and receive the sampling state information of the multi-channel synchronous sampling chip 13, for the CPU core board 18 to read the sampled data, and the sampling frequency timer 1441 is used for (internal) when there is no external key phase/speed signal input Generate the synchronous sampling pulse required by the multi-channel synchronous sampling chip 13, the frequency of the sampling pulse can be set by software, the sampling trigger pulse selection logic 1442 is used to select the output of the internal sampling frequency timer 1441 or the key phase output of the frequency divider 145 The frequency multiplication signal is used as the synchronous sampling pulse of the multi-channel synchronous sampling chip 13. When the key phase frequency multiplication signal is selected, the multiple of the key phase frequency multiplication can be further selected as 8, 16, 32, 64, 128, 256, 512, 1024 times , the interrupt control 147 processes the USB interrupt signal and the AD conversion end interrupt and applies for an interrupt to the CPU.

As shown in accompanying drawing 3, one of the vibration signal conditioning circuits in this embodiment consists of a sensor power supply circuit 111, a vibration signal DC component separation circuit 112, a vibration signal AC component separation circuit 113, an AC component program-controlled amplifier circuit 114, an AC component primary integration circuit 115, The AC component secondary integration circuit 116 and the output signal selection circuit 117 are composed, the sensor power supply circuit 111 adopts the PhotoMOS relay AQW214 to control the switch of the power supply, and the vibration signal DC component separation circuit 112 is realized by a first-order low-pass filter circuit and attenuates the signal by 6 times, The vibration signal AC component separation circuit 113 is implemented by a first-order high-pass filter circuit and attenuates the signal by 2.5 times. The AC component program-controlled amplifier circuit 114 uses an integrated program-controlled amplifier chip LTC6912-1, which can realize 1, 2, 5, 10, 20, 50, 100 seven-stage amplification effectively reduces the size of the circuit board. The AC component primary integration circuit 115 and the AC component secondary integration circuit 116 adopt the high-precision zero-drift operational amplifier LTC2052, which improves the integration accuracy. The output signal selection circuit 117 passes 4 :1 multiplexer MAX4052 implementation, the entire embodiment includes six identical signal conditioning circuits.

As shown in accompanying drawing 4 and accompanying drawing 5, anti-aliasing filter circuit 12 of the present embodiment adopts linear phase, high DC accuracy, 10th-order switched capacitor filter LTC1569-7, and multi-channel synchronous sampling chip 13 adopts 16-bit precision 250KSPS, 6 The channel synchronous sampling chip AD7656, the analog input signal is buffered by the high-speed operational amplifier AD8030 and drives the AD7656, which ensures the sampling speed and sampling accuracy.

As shown in Figure 6, the system control logic 14 of this embodiment is realized by a programmable logic device XC95288XL chip, which effectively improves the integration of the system.

As shown in Figure 7, the pulse shaping circuit 16 of this embodiment includes an input buffer circuit, a reference level adaptive circuit, a comparison shaping circuit and a monostable circuit, and the input buffer circuit can receive signals from eddy current sensors, photoelectric sensors or other types of The input of the speed sensor, the reference level adaptive circuit provides a comparison signal for the comparison shaping circuit, and the key phase/speed signal is shaped into a 0~5V standard TTL level pulse, and the monostable circuit further processes the key phase/speed signal into a fixed pulse The wide signal is used by other circuits.

As shown in accompanying drawing 8, the phase-locked frequency multiplication chip 17 of the present embodiment adopts 74HC4046, selects one loop filter to connect to the frequency multiplication circuit by the 4:1 multiplexer MAX4052, and the four loop filters correspond to four multiplier frequencies respectively. Segment 1Hz～10Hz, 5Hz～50Hz, 20Hz～200Hz, 50Hz～500Hz.

As shown in Figure 9, the CPU core board interface of this embodiment adopts two 36-core connectors, and the ETR232I/H embedded x86CPU main board or EM9160 embedded ARM CPU main board can be selected, and the application software of the data acquisition unit 1 is solidified in the CPU core board FLASH program memory, and through its network interface, built-in/extended USB interface or RS-232C serial interface, it is interconnected with industrial control computer, notebook computer or PDA handheld computer to exchange data.

As shown in Figure 10, the DC/DC power supply of this embodiment can generate ±5V, VCC (+5V), +12V, +3.3V, ±24V power supplies, wherein ±5V is used for analog circuit power supply, VCC is used for digital circuit power supply, +3.3V is used for power supply of programmable logic devices, +12V is used for power supply of external photoelectric sensor, +24V is used for power supply of ICP type acceleration sensor, and -24V is used for power supply of external eddy current sensor.

The computer or palmtop computer of this embodiment is equipped with vibration signal monitoring and analysis diagnostic software, for handheld application environment, this software provides patrol inspection path management, signal acquisition, frequency test and on-site spectrum analysis function, for portable and fixed application environment , the software also provides functions such as online signal monitoring and analysis, historical data management, trend analysis, sample analysis, on-site dynamic balance and data chart printing, which is convenient for equipment status evaluation and fault analysis and processing.

The operating principle of the device of the present invention is as follows:

Take the ETR232I/H embedded x86CPU motherboard as an example. After the data acquisition unit is powered on, the ETR232I/H embedded x86CPU motherboard first starts the DOS operating system solidified in its FLASH program memory, and then runs the data acquisition system stored in the FLASH program memory. Application software, data acquisition application software includes three functional modules of data acquisition and storage, data communication, and system maintenance. After the data acquisition application software runs, it first initializes the work of the data acquisition unit according to the software configuration file currently stored in its FLASH program memory Then start data acquisition and monitor the information of its network, serial interface and externally expanded USB communication port, configure the working mode of the data acquisition unit according to the control command obtained from the communication port from the computer or handheld computer, and complete the data acquisition task. Upload collected data, or perform system software upgrade and maintenance. The workflow of the data acquisition application software is shown in Figure 11.

The vibration signal monitoring and analysis diagnostic software installed on the computer or palmtop computer is used to configure the working mode of the data acquisition unit, receive the vibration data collected from the data acquisition unit, and perform further analysis and processing. Vibration signal monitoring and analysis diagnostic software automatically recognizes equipment speed up/down, constant speed and normal operation status, and performs data analysis and storage. The data is stored at regular intervals when the speed is high, and the data can be stored according to the set speed range or amplitude change and phase change. The software monitors vibration signals and their characteristic values through bar graphs, tables, graphs, etc. display methods, including vibration waveforms, spectrograms, and rotational speed, peak-to-peak amplitude of general frequency, amplitude of power frequency, phase, 0.5X and 2X amplitude, phase, and gap voltage , vibration intensity, peak-to-peak value after removing power frequency, etc., and has a variety of time domain, frequency domain and frequency domain vibration analysis functions, including time domain waveform, correlation analysis, vibration frequency amplitude of each channel and frequency selection Amplitude and phase trend, axis trajectory, axis position, frequency spectrum, Bode diagram, polar coordinate diagram, cascade diagram, waterfall diagram, multi-point time domain waveform, frequency spectrum and trend comparative analysis, wavelet analysis, etc. In addition, The vibration signal monitoring and analysis diagnostic software also provides dynamic balance calculation and print and print preview functions of all monitoring, analysis charts, historical data query results, configuration parameters, etc. For hand-held inspection applications, equipment inspection paths can be managed according to shift inspection, daily inspection, weekly inspection, monthly inspection, etc., adding, deleting, and modifying measurement point collection configuration information, and can be connected through the serial port to download pre-installed The configured inspection path is sent to the PDA handheld computer for on-site inspection and testing. During the inspection and testing process, the sampling process can be monitored, and on-site analysis functions such as data tables, waveform diagrams, and spectrum diagrams are provided. After the inspection and sampling is completed , the sampling data can be uploaded through the serial port communication connection, stored in the corresponding database, and browsed and analyzed afterwards, including data query, trend analysis, waveform diagram, spectrum diagram, etc. The vibration signal monitoring and analysis diagnostic software is specially designed for the frequency measurement needs of blades and structures. It has a single-point amplitude threshold trigger sampling function, and has the functions of frequency measurement sampling data waveform, frequency spectrum and time-frequency analysis. The functional block diagram of the vibration signal monitoring and analysis diagnostic software is shown in Figure 12.

Claims (6)

1. integrated multichannel synchronous oscillation data acquiring and supervision and analysis diagnostic device, form by data acquisition unit and computing machine (2), it is characterized in that, the microprocessor of data acquisition unit (18) is by network, USB or RS-232C serial communication interface and computer interconnection, and computing machine is industrial control computer, notebook computer or PDA palm PC; Microprocessor receives controlling of sampling parameter and the sensor configuration information from computing machine (2), finishes the related data acquisition function, and the data connection of its collection is sent to computing machine for data processing and fault analysis and diagnosis; Described data acquisition unit comprises signal conditioning circuit, the anti-aliasing filtering circuit, the multi-channel synchronous sampling A, the system control logic unit, pulse shaping circuit (16), phase locking frequency multiplying chip and microprocessor constitute, system control logic unit (14) comprises the channel arrangement logical block, the clock generating logical block, the tachometric survey logical block, vibration controlling of sampling logical block and frequency divider constitute, described data acquisition unit (1) directly connects a plurality of eddy current type vibration displacement sensors, ICP type piezoelectric type vibration acceleration sensor or magneto-electric vibrating speed sensors, and have single channel and can directly connect eddy current type, photo-electric or magneto-electric key phase/speed probe interface, the TTL logical signal that the pulse shaping circuit (16) of described data acquisition unit (1) is nursed one's health the generation standard to external bond phase/rotating speed input signal is connected to the inner tachometric survey logical block (143) in system control logic unit (14), finish the real-time detection of speed cycle, the TTL logical signal also be connected to by the common phase locking frequency multiplying circuit that constitutes of phase locking frequency multiplying chip (17) and frequency divider (145) realize key mutually pulse phase locking frequency multiplying and export vibration controlling of sampling logical block (144) to, be used to provide vibration signal Synchronous Sampling Pulse complete cycle; Outside hyperchannel vibration input signal inserts anti-aliasing filtering circuit (12) after the inner signal conditioning circuit (11) of data acquisition unit (1) is handled, output after anti-aliasing filtering circuit (12) is handled inserts the multi-channel synchronous sampling A (13) on the core board expansion bus that is mounted on microprocessor, system control logic unit (14) clock internal produces logical block (142) provides anti-aliasing filtering circuit (12) required cutoff frequency control clock, microprocessor (18) and the common control that is mounted on the inner vibration controlling of sampling logical block (144) in system control logic unit (14) on its core board expansion bus down the realization hyperchannel vibrate synchronous acquisition complete cycle of input signal.

2. multichannel synchronous oscillation data acquiring according to claim 1 and supervision and analysis diagnostic device, it is characterized in that described system control logic unit (14) links to each other with microprocessor core core (18) by bus and the port decoding logic unit (146) that its inside is provided with, channel arrangement logical block (141) comprises sampling control signal selection port (1410), acceleration transducer power supply control port (1411) and gain Serial Control port (1412), sampling control signal is selected port (1410) output 12 tunnel control signal SEL0～SEL11, the corresponding vibrating channel of every two paths of signals, correspond respectively to the AC compounent of selecting this vibrating channel signal, an integration output of AC compounent, the quadratic integral output of AC compounent or the DC component of this vibrating channel signal are used for sampling, acceleration transducer power supply control port (1411) connects and controls the unlatching of 6 road vibration acceleration sensor constant current power supplies or close, gain Serial Control port (1412) connects and controls the enlargement factor of 6 passage vibration signal AC compounent, vibration controlling of sampling logical block (144) comprises AD steering logic unit (1440), sample frequency timer (1441), the sampling trigger pulse is selected logical block (1442), AD steering logic unit (1440 ') provides multi-channel synchronous sampling A (13) required sampling control signal, and receives the sample states information of multi-channel synchronous sampling A (13); Sample frequency timer (1441) is the inner timer that produces the required Synchronous Sampling Pulse of multi-channel synchronous sampling A (13), and the sampling trigger pulse selects logical block (1442) to be used for selecting connecting the Synchronous Sampling Pulse of the key phase frequency-doubled signal of the output of sample frequency timer (1441) or frequency divider (145) output as multi-channel synchronous sampling A (13).

3. integrated multichannel synchronous oscillation data acquiring according to claim 1 and supervision and analysis diagnostic device, it is characterized in that, the power supply of the built-in above-mentioned various kinds of sensors of data acquisition unit (1), wherein ICP type piezoelectric type vibration acceleration sensor constant current power supply is by the program control unlatching of software or close.

4. integrated multichannel synchronous oscillation data acquiring according to claim 1 and supervision and analysis diagnostic device, it is characterized in that the built-in DC/DC power supply of data acquisition unit (15) provides data acquisition unit required power supply, and be external vibration sensor, key phase/speed probe power supply.

5. integrated multichannel synchronous oscillation data acquiring according to claim 1 and supervision and analysis diagnostic device, it is characterized in that described modulate circuit is by sensor feed circuit (111), vibration signal DC component separation circuit (112) and vibration signal AC compounent separation circuit (113) in parallel, AC compounent programmable amplifying circuit (114), an integrating circuit of AC compounent (115) and quadratic integral circuit (116) and output signal selection circuit (117) are formed, vibration signal DC component separation circuit (112) is the single order low-pass filter circuit, vibration signal AC compounent separation circuit (113) is the single order high-pass filtering circuit, the output of vibration signal DC component separation circuit (112) and vibration signal AC compounent separation circuit (113) connects integrating circuit of AC compounent and quadratic integral circuit after connecing AC compounent programmable amplifying circuit (114) again, the AC compounent programmable amplifying circuit is selected integrated program control amplification chip for use, an integrating circuit of AC compounent (115) and AC compounent quadratic integral circuit (116) adopt operational amplifier LTC2052, and output signal selection circuit (117) is realized by the 4:1 MUX.

6. according to the described integrated multichannel synchronous oscillation data acquiring of claim 1 and supervision and analysis diagnostic device, it is characterized in that, described computing machine is equipped with vibration signal and monitors and analyzing and diagnosing software, the working method that is used for the configuration data collecting unit, the vibration data that reception is gathered from data acquisition unit, and further analyze and diagnose; Vibration signal monitors and analyzing and diagnosing software automatic identification equipment lifting/lowering speed, constant speed and normal operating condition, carry out data monitoring, analysis and storage, and transient equilibrium calculating and equipment routing inspection are provided and trigger sampling and analytic function at single measuring point amplitude thresholds that blade, structure frequency measurement need design.

Images