CN202693310U - Fault diagnosis system for multi-channel mechanical equipment - Google Patents

Fault diagnosis system for multi-channel mechanical equipment Download PDF

Info

Publication number
CN202693310U
CN202693310U CN 201220181624 CN201220181624U CN202693310U CN 202693310 U CN202693310 U CN 202693310U CN 201220181624 CN201220181624 CN 201220181624 CN 201220181624 U CN201220181624 U CN 201220181624U CN 202693310 U CN202693310 U CN 202693310U
Authority
CN
China
Prior art keywords
mechanical
signal
equipment
channel
fault diagnosis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN 201220181624
Other languages
Chinese (zh)
Inventor
王执军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Shidai Longcheng Science & Technology Co Ltd
Original Assignee
Beijing Shidai Longcheng Science & Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Shidai Longcheng Science & Technology Co Ltd filed Critical Beijing Shidai Longcheng Science & Technology Co Ltd
Priority to CN 201220181624 priority Critical patent/CN202693310U/en
Application granted granted Critical
Publication of CN202693310U publication Critical patent/CN202693310U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to a fault diagnosis system for multi-channel mechanical equipment, comprising the components as following: a plurality of vibration sensors for obtaining the mechanical vibration signals of the tested mechanical equipment; signal processing equipment used for carrying out analog signal processing to the mechanical vibration signals and motor current signals and for converting the mechanical vibration signals and the motor current signals to digital signals, wherein the signal processing equipment comprises a plurality of signal processing channels which are respectively connected with the vibration sensors and the current sensors; and calculating equipment, which is used for controlling the signal processing channels, controlling the vibration sensors synchronously, processing the digital signals and carrying out fault diagnosis according the processing result, wherein the vibration sensors are connected with the signal processing channels. According to the utility model, rotor and eccentric faults of the detected equipment can be rapidly detected.

Description

The multiple channel mechanical Fault Diagnosis of Mechanical Equipment
Technical field
The utility model relates to the fault detection technique field, relates in particular to a kind of multiple channel mechanical Fault Diagnosis of Mechanical Equipment.
Background technology
In the electric power enterprise, the unusual meeting of motor directly causes the stall of plant equipment, affects the safety of equipment and the person, reduces the rate of starting of equipment, causes the underproduction and stopping production.Therefore carried out analysis and diagnosis for the common fault of AC motor, and made corresponding treatment measures, in time judgement and treatment facility fault and hidden danger play a very important role to the safe and stable operation tool of equipment.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of multiple channel mechanical Fault Diagnosis of Mechanical Equipment, realizes equipment under test is carried out rapid failure diagnosis.
To achieve these goals, the utility model provides a kind of multiple channel mechanical Fault Diagnosis of Mechanical Equipment, comprising:
A plurality of vibration transducers for the mechanical oscillation signal that obtains equipment under test;
Current sensor for the motor current signal that obtains described equipment under test;
Be used for described mechanical oscillation signal and described motor current signal are carried out analog signal processing and described mechanical oscillation signal and described motor current signal be converted to the signal handling equipment of digital signal, comprise a plurality of signal processing channels, described a plurality of signal processing channels are connected with described current sensor with described a plurality of vibration transducers respectively;
For according to the type of described mechanical oscillation signal described a plurality of signal processing channels being controlled and described a plurality of vibration transducers being carried out synchro control and described digital signal is processed to carry out the computing equipment of fault diagnosis according to result, be connected with described a plurality of signal processing channels with described a plurality of vibration transducers.
Above-mentioned the utility model embodiment by a plurality of signal processing channels of computing equipment synchro control, thereby realizes the same axle of equipment under test is fastened the high-speed parallel collection of different vibration signals, and has guaranteed the same-phase collection of multi-channel Vibration Signal; By the collection of signal handling equipment to motor current signal, computing equipment can be analyzed motor current signal, thus detect equipment under test rapidly rotor and the fault of eccentricity of (for example motor).
According to below with reference to accompanying drawing to detailed description of illustrative embodiments, it is clear that further feature of the present utility model and aspect will become.
Description of drawings
The accompanying drawing that is included in the instructions and consists of the part of instructions shows exemplary embodiment of the present utility model, feature and aspect with instructions, and is used for explaining principle of the present utility model.
The structural representation of the multiple channel mechanical Fault Diagnosis of Mechanical Equipment that Fig. 1 provides for embodiment of the utility model.
Embodiment
Describe various exemplary embodiment of the present utility model, feature and aspect in detail below with reference to accompanying drawing.The identical same or analogous element of Reference numeral presentation function in the accompanying drawing.
The structural representation of the multiple channel mechanical Fault Diagnosis of Mechanical Equipment that Fig. 1 provides for embodiment of the utility model.As shown in Figure 1, multiple channel mechanical Fault Diagnosis of Mechanical Equipment 100 comprises: a plurality of vibration transducers (for example: the first vibration transducer 111, the second vibration transducer 112, the 3rd vibration transducer 113), current sensor 12, signal handling equipment 13, computing equipment 14; Wherein, signal handling equipment 13 comprises a plurality of signal processing channels, these a plurality of signal processing channels for example are: the first signal treatment channel 131 that is connected with the first vibration transducer 111, the secondary signal treatment channel 132 that is connected with the second vibration transducer 112, the 3rd signal processing channel 133 that is connected with the 3rd vibration transducer 113, certainly, vibration transducer and signal processing channel are one to one in the embodiment of the invention, and a signal processing channel is processed the mechanical oscillation signal that corresponding vibration transducer gets access to.Computing equipment 14 is connected with the first vibration transducer 111, the second vibration transducer 112, the 3rd vibration transducer 113, first signal treatment channel 131, secondary signal treatment channel 132, the 3rd signal processing channel 133.
Particularly, the first vibration transducer 111, the second vibration transducer 112, the 3rd vibration transducer 113 obtain respectively the mechanical oscillation signal of equipment under test; Current sensor 12 obtains the motor current signal of equipment under test; First signal treatment channel 131, secondary signal treatment channel 132,133 pairs of described mechanical oscillation signals of the 3rd signal processing channel and described motor current signal carry out analog signal processing and described mechanical oscillation signal and described motor current signal are converted to the signal handling equipment of digital signal, comprise a plurality of signal processing channels, described a plurality of signal processing channels are connected with described current sensor with described a plurality of vibration transducers respectively; Computing equipment 14 is used for according to the type of described mechanical oscillation signal first signal treatment channel 131, secondary signal treatment channel 132, the 3rd signal processing channel 133 being controlled, and the first vibration transducer 111, the second vibration transducer 112, the 3rd vibration transducer 113 carried out synchro control, and described digital signal is processed to carry out the computing equipment of fault diagnosis according to result.
The multiple channel mechanical Fault Diagnosis of Mechanical Equipment that the utility model provides, by a plurality of signal processing channels of computing equipment 14 synchro control (for example: first signal treatment channel 131, secondary signal treatment channel 132, the 3rd signal processing channel 133), thereby realize the same axle of equipment under test is fastened the high-speed parallel collection of different vibration signals, and guaranteed the same-phase collection of multi-channel Vibration Signal; By the collection of signal handling equipment to motor current signal, computing equipment 14 can be analyzed motor current signal, thus detect equipment under test rapidly rotor and the fault of eccentricity of (for example motor).
Further, above-mentioned embodiment illustrated in fig. 1 in, each described data processing channel comprises:
Hi-pass filter for described mechanical oscillation signal is carried out high-pass filtering is connected with a described vibration transducer;
Be used for the described mechanical oscillation signal after the high-pass filtering is carried out the low-pass filter of low-pass filtering, be connected with described Hi-pass filter;
Be used for the described mechanical oscillation signal after the low-pass filtering is carried out the integrator of integration, be connected with described low-pass filter;
Be used for the described mechanical oscillation signal behind the integration is converted to the analog to digital converter of digital signal, be connected with described integrator;
Timer conter for the switching rate of controlling described analog to digital converter is connected with described analog to digital converter;
Thereby be used for controlling the collection control module that described timer conter selects to gather the numerical precision of counting to reach default, be connected with described current sensor with described timer conter.
Each described data processing channel also comprises:
Being used for will be through the described mechanical oscillation signal of described Hi-pass filter, and it is carried out envelope processing with the envelope demodulator of the characteristic frequency of obtaining described mechanical oscillation signal, is connected with described amplifier;
Be used for the described mechanical oscillation signal through described envelope demodulator is carried out the anti alias filter of low-pass filtering, be connected between described envelope demodulator and the described analog to digital converter.
Further, above-mentioned embodiment illustrated in fig. 1 in, described computing equipment comprises:
Be used for carrying out the computing unit that the accekeration of described mechanical oscillation signal, velocity amplitude, shift value are obtained in data calculating according to described digital signal, be connected with described analog to digital converter;
Display unit for described accekeration, velocity amplitude, shift value are shown is connected with described computing unit.
Described computing equipment also comprises:
Be used for described accekeration, velocity amplitude, shift value are carried out the Date Conversion Unit of data type conversion, be connected between described analog to digital converter and the described computing unit.
Further, above-mentioned embodiment illustrated in fig. 1 in, integrator specifically can comprise: do not add integrator, add one-time amplifier, add two-time amplifier.
Further, above-mentioned embodiment illustrated in fig. 1 in, amplifier has 1~256 times enlargement factor.
In order more clearly to understand the technical solution of the utility model, the below is described below the course of work of the utility model multiple channel mechanical Fault Diagnosis of Mechanical Equipment 100: computing equipment 14 is according to the concrete number of measuring needs selection data acquisition channel, data acquisition channel adopts Parallel Simulation to process the same-phase collection each other; Gather control module control sampling number, thus the precision that determination data gathers; Enlargement factor when the mechanical oscillation signal that computing equipment 14 is set amplifiers gathers in order to obtain best signal, when the amplitude stability of the mechanical oscillation signal of surveying, should then adopt the automatic range pattern.Under the automatic range pattern, computing equipment 14 systems arrive the most rational degree with the enlargement factor of automatic resonance-amplifier.When the amplitude of the mechanical oscillation signal of surveying is unstable, computing equipment 14 is adjusted to fixedly range with the enlargement factor of amplifier, nine kinds of measurement range selection of the employing that the utility model embodiment can provide, corresponding enlargement factor is 1 times, 2 times, 4 times, 8 times, 16 times, 32 times, 64 times, 128 times, 256 times respectively.
Computing equipment 14 can also be arranged to low-pass filter to add low pass, and then mechanical oscillation signal can pass through at the mechanical oscillation signal that is lower than the low pass flex point, and the signal that is higher than this frequency will be filtered.
Computing equipment 14 can also be arranged to Hi-pass filter to add high pass, then the high-pass filtering process of vibration signal.Computing equipment 14 can have into Hi-pass filter setting 4 grades: 0.1Hz, 10Hz, 400Hz, 1000Hz, and the mechanical oscillation signal that expression is higher than the Set For Current value can pass through, and the mechanical oscillation signal that is lower than this value will be by filtering.
Computing equipment 14 can also be arranged to anti alias filter to add anti-mixed, and then this filtering setting this moment belongs to low-pass filtering, has extraordinary filter effect, effectively the filtering noise signal.(for example: in the time of 1KHz), system with the low-pass cut-off frequencies of automatic setting anti alias filter and set numerical value (for example: 1KHz) consistent when analysis frequency is set as a certain numerical value.
Thereby computing equipment 14 can also be controlled the image data type that integrator is determined mechanical oscillation signal, for example: acceleration (m/s^2), speed (mm/s), three kinds of quantity of states of displacement (um).
What need statement is that above-mentioned utility model content and embodiment only are intended to prove the practical application of technical scheme that the utility model provides, and should not be construed as the restriction to the utility model protection domain.Those skilled in the art are in spirit of the present utility model and principle, when doing various modifications, being equal to and replacing or improve.Protection domain of the present utility model is as the criterion with appended claims.

Claims (7)

1. a multiple channel mechanical Fault Diagnosis of Mechanical Equipment is characterized in that, comprising:
A plurality of vibration transducers for the mechanical oscillation signal that obtains equipment under test;
Current sensor for the motor current signal that obtains described equipment under test;
Be used for described mechanical oscillation signal and described motor current signal are carried out analog signal processing and described mechanical oscillation signal and described motor current signal be converted to the signal handling equipment of digital signal, comprise a plurality of signal processing channels, described a plurality of signal processing channels are connected with described current sensor with described a plurality of vibration transducers respectively;
For according to the type of described mechanical oscillation signal described a plurality of signal processing channels being controlled and described a plurality of vibration transducers being carried out synchro control and described digital signal is processed to carry out the computing equipment of fault diagnosis according to result, be connected with described a plurality of signal processing channels with described a plurality of vibration transducers.
2. multiple channel mechanical Fault Diagnosis of Mechanical Equipment according to claim 1 is characterized in that, each described signal processing channel comprises:
Hi-pass filter for described mechanical oscillation signal is carried out high-pass filtering is connected with a described vibration transducer;
Be used for the described mechanical oscillation signal after the high-pass filtering is carried out the low-pass filter of low-pass filtering, be connected with described Hi-pass filter;
Be used for the described mechanical oscillation signal after the low-pass filtering is carried out the integrator of integration, be connected with described low-pass filter;
Be used for the described mechanical oscillation signal behind the integration is converted to the analog to digital converter of digital signal, be connected with described integrator;
Timer conter for the switching rate of controlling described analog to digital converter is connected with described analog to digital converter;
Thereby be used for controlling the collection control module that described timer conter selects to gather the numerical precision of counting to reach default, be connected with described current sensor with described timer conter.
3. multiple channel mechanical Fault Diagnosis of Mechanical Equipment according to claim 2 is characterized in that, each described signal processing channel also comprises:
Being used for will be through the described mechanical oscillation signal of described Hi-pass filter, and it is carried out envelope processing with the envelope demodulator of the characteristic frequency of obtaining described mechanical oscillation signal, is connected with amplifier;
Be used for the described mechanical oscillation signal through described envelope demodulator is carried out the anti alias filter of low-pass filtering, be connected between described envelope demodulator and the described analog to digital converter.
4. multiple channel mechanical Fault Diagnosis of Mechanical Equipment according to claim 2 is characterized in that, described computing equipment comprises:
Be used for carrying out the computing unit that the accekeration of described mechanical oscillation signal, velocity amplitude, shift value are obtained in data calculating according to described digital signal, be connected with described analog to digital converter;
Display unit for described accekeration, velocity amplitude, shift value are shown is connected with described computing unit.
5. multiple channel mechanical Fault Diagnosis of Mechanical Equipment according to claim 4 is characterized in that, described computing equipment also comprises:
Be used for described accekeration, velocity amplitude, shift value are carried out the Date Conversion Unit of data type conversion, be connected between described analog to digital converter and the described computing unit.
6. multiple channel mechanical Fault Diagnosis of Mechanical Equipment according to claim 2 is characterized in that, described integrator comprises: do not add integrator, add one-time amplifier, add two-time amplifier.
7. multiple channel mechanical Fault Diagnosis of Mechanical Equipment according to claim 3 is characterized in that, described amplifier has 1~256 times enlargement factor.
CN 201220181624 2012-04-25 2012-04-25 Fault diagnosis system for multi-channel mechanical equipment Active CN202693310U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220181624 CN202693310U (en) 2012-04-25 2012-04-25 Fault diagnosis system for multi-channel mechanical equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220181624 CN202693310U (en) 2012-04-25 2012-04-25 Fault diagnosis system for multi-channel mechanical equipment

Publications (1)

Publication Number Publication Date
CN202693310U true CN202693310U (en) 2013-01-23

Family

ID=47548914

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220181624 Active CN202693310U (en) 2012-04-25 2012-04-25 Fault diagnosis system for multi-channel mechanical equipment

Country Status (1)

Country Link
CN (1) CN202693310U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104180893A (en) * 2013-05-24 2014-12-03 安徽容知日新信息技术有限公司 Monitoring device for unstable-state mechanical equipment vibration signal
CN105829857A (en) * 2013-12-12 2016-08-03 Ntn株式会社 Method and system for inspecting rotary machine component by using portal terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104180893A (en) * 2013-05-24 2014-12-03 安徽容知日新信息技术有限公司 Monitoring device for unstable-state mechanical equipment vibration signal
CN105829857A (en) * 2013-12-12 2016-08-03 Ntn株式会社 Method and system for inspecting rotary machine component by using portal terminal

Similar Documents

Publication Publication Date Title
CN102155984B (en) General vibration signal measuring system of fan
CN102608452A (en) High speed train equipment state and electric energy quality monitoring system and method
CN104111154A (en) Vibration trend analyzing method and vibration trend analyzing system for wind generating set
CN103743334A (en) Resistance strain gauge
CN107013421A (en) A kind of wind power generating set wheel speed measuring method and system
CN103116032A (en) Method and device for obtaining revolving speed of wind generating set
CN204255494U (en) Bridge vibration monitoring device
CN202693310U (en) Fault diagnosis system for multi-channel mechanical equipment
CN202583342U (en) Equipment state and electric energy-quality monitoring system for high speed train
CN107121271B (en) Experimental method for identifying foundation modal parameters of heavy machine tool foundation
CN203259542U (en) Flexible pendulous accelerometer digital control circuit
CN202974422U (en) Sensor and engineering machine containing the same
CN104391176A (en) Software and hardware frequency measurement circuit compatible with electric power system signals
CN202599609U (en) Field dynamic balancer
CN202886471U (en) Multi-channel leakage current phase difference detection equipment
CN203012079U (en) A partial discharge UHF sensor internally disposed in a GIS
CN204228369U (en) A kind of calibrating installation of vibration table
CN201740627U (en) Electric measurement device for dynamic balance
CN102175264A (en) Method for measuring bandwidth of optical fiber gyroscope
CN202141810U (en) High precision natural electric field physical prospecting measuring apparatus
CN204202871U (en) A kind of gearbox of wind turbine state evaluation device
CN103017889A (en) Sensor, method for same and engineering machine containing same
CN202350904U (en) Integrated vibration transmitter
CN104133136A (en) Testing device for rotating table frequency response
CN204421980U (en) Numerical model analysis filtering low flow velocity electromagnetic flowmeter

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model