CN108196126A - A kind of spacecraft slip ring resistance states monitoring device and method - Google Patents
A kind of spacecraft slip ring resistance states monitoring device and method Download PDFInfo
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- CN108196126A CN108196126A CN201711497601.8A CN201711497601A CN108196126A CN 108196126 A CN108196126 A CN 108196126A CN 201711497601 A CN201711497601 A CN 201711497601A CN 108196126 A CN108196126 A CN 108196126A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to a kind of spacecraft slip ring resistance states monitoring device and method, the monitoring device includes sensitive element module, signal condition acquisition module, signal processing module and wireless communication module.The characteristics of present invention leads to the resistance change between brush and loop by using the damage of spacecraft conducting slip ring, the quick detection changed using the realization of sampling with high precision component to conducting slip ring contact resistance value, by the way that compared with the dynamic standard loop resitance of foundation, the contact resistance for making measurement is more accurate；Using Spectral Analysis Method, time-domain analysis not noticeable failure and incipient fault are found.
Description
Technical field
The present invention relates to field of aerospace technology more particularly to a kind of spacecraft slip ring resistance states monitoring device and sides
Method.
Background technology
In recent decades, constantly the putting into energetically to aerospace with China, China is in the aeronautical and space technology of tip
Good breakthrough is achieved, and the performance of the key positions such as conducting slip ring that tip device largely uses directly determines equipment
Service life and working performance.
Spacecraft conducting slip ring be realize two rotating devices being relatively isolated between signal, electric energy transmission device, knot
It is mainly made of on structure components such as slip-ring body, brush assembly of electric, sectional shelf-unit, radial ball bearing, bearing (ball) covers.
Precise conductive slip ring component belongs to precision components, and requirement is reliable, signal distortion is small, performance is steady in slip ring work
Calmly, the features such as transmission accuracy is high, global design is compact-sized, work more circuit, low noise, service life are long and easy for installation
The advantages that.
During conducting slip ring works, the variation of Specifeca tion speeification and its job stability, reliability and longevity
Life has very big relationship, and there are certain security risk, for example, brush is mutually worn with ring can generate deposition electricity Jie
Matter, so that the loop contact resistance variation amount becomes larger；Ring deformation also results in loop contact resistance variation amount and becomes larger, ring
Circle deformation has several factors, and main cause is that ageing treatment is inadequate, and stress release is uneven, leads to malformation, so that
Contact resistance variation amount becomes larger.
At present, it is domestic not yet to formulate correlation technique or the standard that conducting slip ring monitors in real time, therefore for the real-time of slip ring
Monitoring or blank out.
Invention content
In view of above-mentioned analysis, the present invention is intended to provide a kind of spacecraft slip ring resistance states monitoring device and method, needle
To the special construction of spacecraft slip ring, while slip ring resistance value monitoring effect is ensured, using structure design is simplified, prison is improved
Survey the reliability and stability of device.
The purpose of the present invention is mainly achieved through the following technical solutions：
A kind of spacecraft slip ring resistance states monitoring device, at sensitive element module, signal condition acquisition module, signal
Manage module and wireless communication module；
The sensitivity element module is located at the slip ring close to solar energy sailboard supply lines side, is connected to monitored slip ring electricity
Between brush on energy transmission channel, electric current and voltage signal are acquired；The sensitivity element module and the slip ring resistance quantity of monitoring
It is identical, it connects one to one；
The signal condition sampling module carries out amplitude tune to the collected electric current of the sensitivity element module and voltage signal
AD transformation is carried out after reason and noise reduction, obtains digital galvanic current and voltage signal；
The monitoring signals processing module calculates the real time resistance value R of slip ring according to digital galvanic current and voltage signal
(t)；According to standard loop resistance RMark(t) contact resistance Δ R (t) is calculated；According to the size of contact resistance Δ R (t), slip ring is judged
Whether break down；
The communication module uses the fault message that wireless communication mode real-time Transmission occurs, monitoring described in timing transmission
The monitoring data of signal processing module.
Further, the sensitive element module includes voltage acquisition component and current acquisition component；
The voltage acquisition component is made of voltage sensor device, measures brush both end voltage signal in real time；
The current acquisition component is made of current sense device, measures the electric current letter on slip ring electric energy transmission channel in real time
Number；
The frequency acquisition of the voltage acquisition component and current acquisition component is more than or equal to 3.6Hz.
Further, the standard loop resistance RMark(t) it is differential resistance values, resistance value is obtained to be monitored to multichannel slip ring
The resistance value obtained after being averaged again after filtering.
Further, the contact resistance Δ R (t)=R (t)-RMark(t), compare contact resistance Δ R (t) and the prison of setting
Threshold value is surveyed, whether judgement slip ring breaks down；More than threshold value, then it is assumed that slip ring breaks down, and data is stored, and will be different
Reason condition carries out upload alarm；Threshold value is not above, then, data are stored, and continues to acquire signal.
Further, the monitoring threshold is standard loop resistance RMark(t) 10%.
A kind of spacecraft slip ring resistance states monitoring method, includes the following steps：
Step 1 obtains the resistance value R (t) at brush both ends according to the slip ring value of electrical signals monitored in real time；
Step 2, monitoring contact resistance Δ R (t) changes in real time, to judge whether slip ring breaks down；
Step 3 carries out spectrum analysis to the slip ring resistance value R (t) of certain monitoring cycle, further carries out the failure of slip ring
Early warning.
Further, step 2 includes following sub-step：
Step 201, to multichannel slip ring monitor obtain resistance value filtering after be averaged again after obtain standard loop resistance RMark
(t)；
Step 202, by the real time resistance value R (t) of monitoring and standard loop resistance RMark(t) subtract each other to obtain monitoring contact resistance
Δ R (t), with formula Δ R (t)=R (t)-RMark(t) it represents；
Step 203 compares contact resistance Δ R (t) and the monitoring threshold of setting；More than threshold value, then it is assumed that event occurs in slip ring
Barrier, data is stored, and abnormal conditions are carried out upload alarm；Threshold value is not above, then, data are stored, and
Continue to acquire signal, the monitoring threshold is standard loop resistance RMark(t) 10%.
Further, step 3 includes following sub-step：
Step 301 carries out fft analysis to the slip ring resistance value R (t) of certain monitoring cycle, obtains monitoring spectrum F (w)；
Step 302, by the way that frequency spectrum F (w) and standard frequency spectrum F will be monitoredMark(w) comparison carries out sentencing for failure and failure cause
It is fixed.
Further, certain monitoring cycle is more than or equal to 48 hours.
Further, the monitoring frequency spectrum F (w) and standard frequency spectrum FMark(w) variable quantity of spectrum harmonics component is excessive, then
Showing slip ring, there are wear-out failures；The monitoring frequency spectrum F (w) and standard frequency spectrum FMark(w) the variable quantity mistake of frequency spectrum main screen component
Greatly, then showing slip ring, there are slip ring deformation or the centrifugations of slip ring axis.
The present invention has the beneficial effect that：
The characteristics of leading to the resistance change between brush and loop by using the damage of spacecraft conducting slip ring, utilize height
Precision sampling component realizes the quick detection changed to conducting slip ring contact resistance value, passes through the dynamic standard loop with foundation
Resistance compares, and the contact resistance for making measurement is more accurate；Use Spectral Analysis Method, it is possible to find the not noticeable failure of time-domain analysis
And incipient fault.
Other features and advantages of the present invention will illustrate in the following description, also, partial become from specification
It obtains it is clear that being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and is obtained in book, claims and attached drawing.
Description of the drawings
Attached drawing is only used for showing the purpose of specific embodiment, and is not considered as limitation of the present invention, in entire attached drawing
In, identical reference mark represents identical component.
Fig. 1 is spacecraft slip ring resistance states monitoring device composition frame chart.
Specific embodiment
The preferred embodiment of the present invention is specifically described below in conjunction with the accompanying drawings, wherein, attached drawing forms the application part, and
It is used to illustrate the principle of the present invention together with embodiments of the present invention.
The specific embodiment of the present invention, discloses a kind of spacecraft slip ring resistance states monitoring device, such as Fig. 1 institutes
Show, including sensitive element module, signal condition acquisition module, signal processing module and wireless communication module；
The sensitivity element module is located at the slip ring close to solar energy sailboard supply lines side, is connected to monitored slip ring
Between brush on electric energy transmission channel, the electric current and voltage signal of slip ring resistance are acquired；
The loop of the sensitivity element module and spacecraft slip ring corresponds；When the loop of spacecraft slip ring is all the way,
Sensitive element module is one；When the loop of spacecraft slip ring is multichannel, the quantity of sensitive element module and the ring of spacecraft slip ring
Way amount is identical, and is correspondingly connected with；
The sensitivity element module includes voltage acquisition component and current acquisition component；
The voltage acquisition component is made of voltage sensor device, measures brush both end voltage signal, measurement accuracy in real time
Better than 0.001, the response time is less than 1 microsecond；
The current acquisition component is made of current sense device, measures the electric current letter on slip ring electric energy transmission channel in real time
Number, measurement accuracy is better than 0.001, and the response time is less than 1 microsecond；
The frequency acquisition of voltage acquisition component and current acquisition component is more than or equal to 3.6Hz.
The signal condition sampling module carries out amplitude to the collected electric current of the sensitivity element module and voltage weak signal
AD transformation is carried out after conditioning and noise reduction, obtains the electric current and voltage signal of digitlization slip ring；The amplitude conditioning and noise reduction, make to adopt
Collection signal meets AD transformation input ranges；The digit of the AD transformation is 16, forms the electric current number of the digitlization slip ring of 16
According to the voltage data of the digitlization slip ring with 16.
The monitoring signals processing module handles the electric current and voltage signal that digitize slip ring, monitors and deposits in real time
The resistance value R (t) at storing up electricity brush both ends；
Establish dynamic standard loop resistance RMark(t), brush streaks slip ring when due to work, accesses the slip ring resistance in circuit
Real-time change, the standard loop resistance RMark(t) it is differential resistance values,
In embodiment, after being filtered to the multichannel slip ring resistance value R (t) of monitoring, then the resistance value obtained after being averaged is
Standard loop resistance RMark(t)；
Pass through real time resistance R (t) and standard loop resistance RMark(t) comparison obtains contact resistance Δ R (t)=R (t)-RMark
(t)；
Setting monitoring threshold is standard loop resistance RMark(t) 10%；Monitoring signals processing module monitors contact electricity in real time
Hinder Δ R (t) whether be more than monitoring threshold, be, then it is assumed that slip ring break down, data are stored, and by abnormal conditions into
Row uploads alarm；It is no, then, data are stored, and continue to acquire signal.
The communication module realizes the real-time Transmission of abnormal data using wireless communication mode, realizes determining for storage data
When transmit；The communication module is made of radio frequency communication chips, at the sensitive element module, Signal-regulated kinase, signal
Reason module integrates, and is integrated in a small device by SIP encapsulation or PCB encapsulation technologies；The communication module
Real-time Transmission abnormal data and timing transmission store data into ground, for ground controller to the failure of slip ring carry out judge and
Processing；The wireless communication mode of the embodiment of the present invention uses FSK modulation.
A kind of spacecraft slip ring resistance states monitoring method, includes the following steps：
Step 1 obtains the resistance value R (t) at brush both ends according to the slip ring value of electrical signals monitored in real time；
The real-time current value i (t) on slip ring electric energy transmission channel is flowed through in the current acquisition component acquisition；Voltage acquisition group
Part monitoring brush both end voltage u (t) changes, and according to Ohm's law, obtains the resistance value R (t), the resistance value R at brush both ends
(t) the real-time equivalent resistance R'(t including slip ring), two brushes and the contact resistance Δ R (t) of slip ring and load resistance RLString
Join resistance value；
The real-time equivalent resistance of the slip ringIn formula, r is slip ring radius, and f is slip ring
Speed, A are slip ring contact area, and ρ is resistivity；
The contact resistance Δ R (t) of described two brushes and slip ring is very small when slip ring is normal, close to 0；Work as slip ring
When abrasion, deformation or slip ring axis centrifuge, the contact resistance Δ R (t) of described two brushes and slip ring can increase；Load resistance RL
For constant value.
When slip ring is polycyclic line structure, the electric current of corresponding loop is each measured with the sensitive element module of corresponding loop connection
Value and voltage value, the real time resistance value for obtaining corresponding loop are R1(t) ..., Rn(t), the n is the loop quantity of slip ring.
Step 2, monitoring contact resistance Δ R (t) changes in real time, to judge whether slip ring breaks down
Step 201 establishes standard loop resistance RMark(t)
Brush streaks slip ring during due to work, what when slip ring resistance for accessing circuit changed, in the present invention, the mark
Quasi- resistance value RMark(t) it is differential resistance values, to being obtained after being averaged again after Multi-channel monitoring acquisition resistance value filtering, using averaging
Influence of the environmental change for resistance value in the method maskable short time of value improves the accuracy of standard value.
Step 202, by the real time resistance value R (t) of monitoring and standard loop resistance RMark(t) subtract each other to obtain contact resistance Δ R
(t), with formula Δ R (t)=R (t)-RMark(t) it represents；
Step 203 compares contact resistance Δ R (t) and the monitoring threshold of setting, and whether judgement slip ring breaks down；It is more than
Threshold value, then it is assumed that slip ring breaks down, and data is stored, and abnormal conditions are carried out upload alarm；It is not above threshold value,
Then, data are stored, and continues to acquire signal, the monitoring threshold is standard loop resistance RMark(t) 10%.
Step 3 carries out spectrum analysis to the slip ring resistance value R (t) of certain monitoring cycle, further carries out the failure of slip ring
Early warning
The abrasion or deformation of slip ring loop are usually a slow process, and change procedure is complicated, it is difficult to supervising
It surveys in the variation of variable quantity time domain and carries out direct failure cause judgement, time domain variable quantity signal is transformed into frequency domain is analyzed just
It can be relatively easily very much.
Step 301 carries out fft analysis to the slip ring resistance value R (t) of certain monitoring cycle, obtains monitoring spectrum F (w)；
According to Fourier transform principle, loop monitoring signals time domain variable quantity is transformed into frequency domain and is analyzed：
t1For monitoring cycle start time, t2For monitoring cycle end time, F (w) is monitoring frequency spectrum；
The detection cycle meets under normal circumstances：t2-t1>=48 hours；
Step 302, by the way that frequency spectrum F (w) and standard frequency spectrum F will be monitoredMark(w) comparison carries out sentencing for failure and failure cause
It is fixed；
In some circumstances, slight failure is difficult straight since the variable quantity of contact resistance is less than monitoring threshold
It connects method of comparison and determines to come or report by mistake, but this minimum variable quantity can be reflected in the humorous of peri odic spectrum after converting
On wave component, by macrocyclic Fourier transform processing, it can be found that being slight failure, and to the development of slight failure
It determines；
1) the standard frequency spectrum F of slip ring resistance is establishedMark(w), the standard frequency spectrum FMark(w) it is in contact resistance Δ R (t)=0
In the case of carry out frequency-domain transform obtain frequency spectrum；
2) monitoring frequency spectrum F (w) and standard frequency spectrum F is comparedMark(w) judge failure and failure cause
Compare the standard frequency spectrum F of monitoring frequency spectrum F (w) and slip ringMark(w), the difference of frequency spectrum main screen component and harmonic component is observed
It is different；If the variable quantity of spectrum harmonics component is excessive, showing slip ring, there are wear-out failures；If the variation of frequency spectrum main screen component
Measure it is excessive, then show slip ring there are slip ring deformation or slip ring axis centrifugation.
In conclusion spacecraft slip ring resistance states monitoring device provided in an embodiment of the present invention and method, by using
The characteristics of damage of spacecraft conducting slip ring leads to the resistance change between brush and loop, using sampling with high precision component come real
Now to the quick detection of conducting slip ring contact resistance value variation, by compared with the dynamic standard loop resitance of foundation, making measurement
Contact resistance it is more accurate；Using Spectral Analysis Method, time-domain analysis not noticeable failure and incipient fault are found.
It will be understood by those skilled in the art that realizing all or part of flow of above-described embodiment method, meter can be passed through
Calculation machine program is completed to instruct relevant hardware, and the program can be stored in computer readable storage medium.Wherein, institute
Computer readable storage medium is stated as disk, CD, read-only memory or random access memory etc..
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of spacecraft slip ring resistance states monitoring device, which is characterized in that including sensitive element module, signal condition acquisition mould
Block, signal processing module and wireless communication module；
The sensitivity element module is located at the slip ring close to solar energy sailboard supply lines side, is connected to monitored slip ring electric energy and passes
Between brush on defeated access, electric current and voltage signal are acquired；The sensitivity element module is identical with the slip ring resistance quantity monitored,
It connects one to one；
The signal condition sampling module the collected electric current of the sensitive element module and voltage signal are carried out amplitude conditioning and
AD transformation is carried out after noise reduction, obtains digital galvanic current and voltage signal；
The monitoring signals processing module calculates the real time resistance value R (t) of slip ring according to digital galvanic current and voltage signal；Root
According to standard loop resistance RMark(t) contact resistance Δ R (t) is calculated；According to the size of contact resistance Δ R (t), whether judgement slip ring goes out
Existing failure；
The communication module uses the fault message that wireless communication mode real-time Transmission occurs, monitoring signals described in timing transmission
The monitoring data of processing module.
2. monitoring device according to claim 1, which is characterized in that it is described sensitivity element module include voltage acquisition component and
Current acquisition component；
The voltage acquisition component is made of voltage sensor device, measures brush both end voltage signal in real time；
The current acquisition component is made of current sense device, measures the current signal on slip ring electric energy transmission channel in real time；
The frequency acquisition of the voltage acquisition component and current acquisition component is more than or equal to 3.6Hz.
3. monitoring device according to claim 1, which is characterized in that the standard loop resistance RMark(t) it is dynamic electric resistor
Value, for the resistance value to being obtained after being averaged again after multichannel slip ring monitoring acquisition resistance value filtering.
4. monitoring device according to claim 1, which is characterized in that the contact resistance Δ R (t)=R (t)-RMark(t),
Compare contact resistance Δ R (t) and the monitoring threshold of setting, whether judgement slip ring breaks down；More than threshold value, then it is assumed that slip ring goes out
Existing failure, data is stored, and abnormal conditions are carried out upload alarm；Threshold value is not above, then, data are deposited
Storage, and continue to acquire signal.
5. monitoring device according to claim 4, which is characterized in that the monitoring threshold is standard loop resistance RMark(t)
10%.
6. a kind of spacecraft slip ring resistance states monitoring method, which is characterized in that include the following steps：
Step 1 obtains the resistance value R (t) at brush both ends according to the slip ring value of electrical signals monitored in real time；
Step 2, monitoring contact resistance Δ R (t) changes in real time, to judge whether slip ring breaks down；
Step 3 carries out spectrum analysis to the slip ring resistance value R (t) of certain monitoring cycle, and the failure for further carrying out slip ring is pre-
It is alert.
7. monitoring method according to claim 6, which is characterized in that step 2 includes following sub-step：
Step 201, to multichannel slip ring monitor obtain resistance value filtering after be averaged again after obtain standard loop resistance RMark(t)；
Step 202, by the real time resistance value R (t) of monitoring and standard loop resistance RMark(t) subtract each other to obtain contact resistance Δ R (t)；
Step 203 compares contact resistance Δ R (t) and the monitoring threshold of setting；More than threshold value, then it is assumed that slip ring breaks down, will
Data are stored, and abnormal conditions are carried out upload alarm；Threshold value is not above, then, data are stored, and continues to adopt
Collect signal, the monitoring threshold is standard loop resistance RMark(t) 10%.
8. monitoring method according to claim 6, which is characterized in that step 3 includes following sub-step：
Step 301 carries out fft analysis to the slip ring resistance value R (t) of certain monitoring cycle, obtains monitoring spectrum F (w)；
Step 302, by the way that frequency spectrum F (w) and standard frequency spectrum F will be monitoredMark(w) comparison carries out the judgement of failure and failure cause.
9. monitoring method according to claim 8, which is characterized in that certain monitoring cycle is more than or equal to 48 hours.
10. monitoring method according to claim 8, which is characterized in that
The monitoring frequency spectrum F (w) and standard frequency spectrum FMark(w) variable quantity of spectrum harmonics component is excessive, then shows that slip ring exists
Wear-out failure；The monitoring frequency spectrum F (w) and standard frequency spectrum FMark(w) variable quantity of frequency spectrum main screen component is excessive, then shows slip ring
There are slip ring deformation or the centrifugations of slip ring axis.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110988482A (en) * | 2019-11-29 | 2020-04-10 | 北京自动化控制设备研究所 | Conductive slip ring screening test method |
| CN112650142A (en) * | 2020-12-26 | 2021-04-13 | 山西龙源风力发电有限公司 | Slip ring maintenance monitoring platform and detection method thereof |
| CN112782479A (en) * | 2019-11-04 | 2021-05-11 | 杭州海康威视数字技术股份有限公司 | Method and device for detecting contact resistance of slip ring |
| CN116953414A (en) * | 2023-09-15 | 2023-10-27 | 无锡同康工程技术有限公司 | Intelligent monitoring method and system for slip ring |
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Cited By (5)
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| CN112782479A (en) * | 2019-11-04 | 2021-05-11 | 杭州海康威视数字技术股份有限公司 | Method and device for detecting contact resistance of slip ring |
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| CN112650142A (en) * | 2020-12-26 | 2021-04-13 | 山西龙源风力发电有限公司 | Slip ring maintenance monitoring platform and detection method thereof |
| CN116953414A (en) * | 2023-09-15 | 2023-10-27 | 无锡同康工程技术有限公司 | Intelligent monitoring method and system for slip ring |
| CN116953414B (en) * | 2023-09-15 | 2023-11-21 | 无锡同康工程技术有限公司 | Intelligent monitoring method and system for slip ring |
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| CN108196126B (en) | 2020-03-27 |
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