CN208780592U - Binary channels inductance sensor based on phase shift technology while detection device - Google Patents
Binary channels inductance sensor based on phase shift technology while detection device Download PDFInfo
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Abstract
The utility model relates to a kind of the binary channels inductance sensor based on phase shift technology while detection device.In order to overcome the problems, such as that multichannel inductance detection system is huge in the prior art, detection effect is poor, is not able to satisfy actually detected application demand, the utility model proposes a kind of the binary channels inductance sensor based on phase shift technology while detection device detect while realization merely with sine wave exciting signal all the way and a set of Signal sampling and processing device to two-way detection sensor.In practical applications, it is detected compared to single channel, binary channels detects simultaneously can be improved detected flow of lubrication, and the inductance coil of different inner diameters size also may be implemented to carry out more accurate detection to the particle of different size ranges on two alignment detection circuit of binary channels.The utility model detection device is simple, and testing result is reliable, suitable in the inductance detection field of metal micro particles and the popularization and use of other detection fields.
Description
Technical field
The utility model relates to the inductance detection of metal micro particles and field of signal processing, in particular to a kind of to be based on phase shift
The binary channels inductance sensor while detection device of technology.
Background technique
Carrying out accurate detection to Wear Debris in Lubricating Oil using inductance detection method is realized to Wear Condition of Machinery
Monitoring, the key for realizing fault pre-diagnosing and preventative maintenance.Correlative study discovery utilizes abrasive grain in inductance method detection lubricating oil
When, the internal diameter of inductance coil is smaller, and detection accuracy and detection sensitivity are higher.In order to obtain higher detection accuracy and sensitive
Degree, in practical applications, usually using the inductance coil of smaller internal diameter, but the inductance coil of smaller internal diameter had both limited big
The increase by again limiting detection flows of grain.In order to expand the particle size range and flow of lubrication of inductance method detection particle,
Multiple research teams devise the multi-channel detection circuit based on technologies such as frequency partition, time division multiplexing, parallel circuits.But mesh
Preceding multi-channel detection technology detection system is huge, detection effect is bad, cannot meet the needs of practical application well.
Utility model content
In order to overcome in the prior art, multichannel inductance detection system is huge, detection effect is poor, it is actually detected not to be able to satisfy
The problem of application demand, the utility model proposes a kind of, and the binary channels inductance sensor based on phase shift technology detects dress simultaneously
It sets, which realizes merely with sine wave exciting signal all the way and a set of Signal sampling and processing device to two-way detection sensor
While detect.In practical applications, it is detected compared to single channel, binary channels, which detects can be improved simultaneously, is detected lubrication oil stream
Amount, and to different size ranges also may be implemented in the inductance coil of different inner diameters size on two alignment detection circuit of binary channels
Grain carries out more accurate detection.
To achieve the above object, the utility model uses following technical scheme:
Binary channels inductance sensor based on phase shift technology while detection device, which is characterized in that including signal source, point letter
Number module, phase shift block, detection sensor module, signal interception module, signal synthesizing module and signal acquisition process module,
In:
Signal source is for generating sine wave exciting signal；
Sub-signal module receives the sine wave exciting signal that signal source generates, and the signal of exciting signal source is divided into two-way
Identical sine wave exciting signal；Sub-signal module includes a voltage follower, to eliminate load variation to exciting signal source
Stabilization signal source output signal amplitude is played the role of in the influence of output signal, and the voltage follower connects two delivery outlets,
To export the identical sine wave exciting signal of two-way amplitude, frequency, phase to phase shift block and detection sensor module；
Phase shift block includes a see-saw circuit, see-saw circuit by receive that sub-signal module exports all the way just
String wave excitation signal carries out reverse phase processing, the sine wave exciting signal before reverse phase treated sine wave exciting signal and processing
Initial phase phase difference of pi；
Detection sensor module includes that two loads need to be detected the sensor of substance, respectively corresponds and receives sub-signal module
The sine wave exciting signal and phase shift block reverse phase of output treated sine wave exciting signal, each sensor include inductance electricity
Hold antiresonant circuit, inductance coil is the circuit being composed in series by inductance and resistance, and inductance coil forms in parallel with capacitor
Resonance circuit；
Further, each sensor includes inductance capacitance antiresonant circuit and see-saw circuit, inductance
The impedance of capacitor antiresonant circuit exports in such a way that reverse phase is amplified；Inductance capacitance antiresonant circuit is connected across reverse phase amplification electricity
Between the operational amplifier output terminal and inverting input terminal on road.
Further, the inductance coil of two sensors of the detection sensor module uses identical specification ruler
Very little, two inductance coils, two identical antiresonant circuits of capacitor identical with capacitance formation in parallel respectively guarantee two
Sensor detection sensitivity having the same.
Signal interception module includes two diodes, respectively corresponds the two-way sine wave for receiving the output of detection sensor module
Signal, two diodes have one-way conduction effect, make only to retain positive half cycle letter by the sine wave signal of signal interception module
Number；
Further, the diode is the detector diode with fast recovery characteristics.
Signal synthesizing module includes a summing circuit, and the two-way after receiving the interception of signal interception module only retains positive half cycle
The sine wave signal of phase signal, and synthesized output signal all the way；
Signal acquisition process module includes data acquisition card, using synchronous sampling method, data acquisition card and pumping signal
Source works under same reference clock, and the signal that the frequency acquisition of adjustment signal capture card is twice in signal source generates frequency, and
By the peak value of the sine wave of the output signal of the phase acquisition of the sampling clock of adjustment signal capture card to synthesis, after acquisition
Sine wave signal is analyzed and processed according to demand.
Binary channels inductance sensor Simultaneous Detection based on phase shift technology, the sine-wave excitation issued by signal source
Signal function needs on two sensors for being detected substance in load, which is characterized in that steps are as follows:
(1) sub-signal
The pumping signal of signal source is divided into the identical sine wave exciting signal of identical two-way；
(2) phase shift is handled
By sub-signal treated all the way sine wave exciting signal carry out reverse phase processing, reverse phase treated sine-wave excitation
The initial phase phase difference of pi of sine wave exciting signal before signal and processing；
(3) sensor detects
Two loads need to be detected the sensor of substance, respectively correspond the letter of sine-wave excitation all the way for receiving sub-signal output
Number and phase shift treated another way sine wave exciting signal, detect PM signals to be detected；
(4) signal intercepts
The two-way sine wave signal for receiving detection sensor output is respectively corresponded, and intercepts two-way sine wave signal and only retains
Positive half cycle signal；
(5) signal synthesizes
The sine wave signal that two-way is only retained to positive half period signal synthesizes output signal all the way；
(6) signal acquisition process
Using the output signal all the way after synchronous sampling method acquisition synthesis, data acquisition card and signal source work are same
Under reference clock, the signal for making the frequency acquisition of data acquisition card be twice in signal source generates frequency, is acquired by adjustment signal
The sine wave signal of the phase acquisition two-way sensor output of the sampling clock of card, extracts two-way sensor and exports sine wave signal
Peak value, be analyzed and processed according to demand.
The beneficial effect of the utility model compared with prior art is:
The utility model is realized using sine wave exciting signal all the way and a set of Signal sampling and processing device and is examined to two-way
It is detected while surveying sensor, reduces testing cost；In practical applications, detect simultaneously can be with compared with single channel detection for binary channels
It improves and is detected flow of lubrication, in addition, the inductance coil of different inner diameters size also may be implemented to not on two alignment detection circuits
Particle with size range carries out more accurate detection.The utility model detection device is simple, and testing result is reliable, is suitable for
The inductance detection field of metal micro particles and other detection fields are promoted the use of.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the binary channels inductance sensor based on phase shift technology while detection device；
Fig. 2 is the signal processing schematic diagram of the binary channels inductance sensor Simultaneous Detection based on phase shift technology；
In figure: 1 signal source；2 sub-signal modules；3 phase shift blocks；4 detection sensor modules；5 signal interception modules；6 letters
Number synthesis module；7 signal acquisition process modules；8 signal source signals；9 sub-signals one；10 sub-signals two；Point letter of 11 non-phase shifts
Number one；Sub-signal two after 12 phase shifts；The sub-signal one of 13 positive interceptions；The sub-signal two of 14 positive interceptions；15 composite signals；
16 first via sensor output signals；17 No. second sensor output signals.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is only the utility model a part of the embodiment, instead of all the embodiments.Below at least one example
The description only actually of property embodiment be it is illustrative, never as to the utility model and its application or any limit used
System.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the utility model.As used herein, unless the context clearly indicates otherwise, otherwise singular
Form be also intended to include plural form, additionally, it should be understood that, when in the present specification use term "comprising" and/or
When " comprising ", existing characteristics, step, operation, device, component and/or their combination are indicated.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
Up to the unlimited the scope of the utility model processed of formula and numerical value.Simultaneously, it should be clear that for ease of description, each shown in attached drawing
The size of a part is not to draw according to actual proportionate relationship.Skill known for person of ordinary skill in the relevant
Art, method and apparatus may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as awarding
Weigh part of specification.In shown here and discussion all examples, example should be construed as merely by appointing to occurrence
Property, not as limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar
Label and letter similar terms are indicated in following attached drawing, therefore, once be defined in a certain Xiang Yi attached drawing, then with
In attached drawing afterwards do not need that it is further discussed.
In the description of the present invention, it should be understood that the noun of locality such as " front, rear, top, and bottom, left and right ", " laterally,
Vertically, vertically, it is horizontal " and " pushing up, bottom " etc. indicated by orientation or positional relationship be normally based on orientation or position shown in the drawings
Relationship is set, is merely for convenience of describing the present invention and simplifying the description, in the absence of explanation to the contrary, these nouns of locality
Do not indicate that and imply that signified device or element must have a particular orientation or be constructed and operated in a specific orientation, because
This should not be understood as the limitation to scope of protection of the utility model: the noun of locality " inside and outside " refers to the wheel relative to each component itself
Wide is inside and outside.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under its device or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
In addition, it should be noted that, limiting components using the words such as " first ", " second ", it is only for be convenient for
Corresponding components are distinguished, do not have Stated otherwise such as, there is no particular meanings for above-mentioned word, therefore should not be understood as to this
The limitation of utility model protection range.
Embodiment 1
As shown in Figure 1, the detection device, including signal source 1, point letter simultaneously of the binary channels inductance sensor based on phase shift technology
Number module 2, phase shift block 3, detection sensor module 4, signal interception module 5, signal synthesizing module 6 and signal acquisition process mould
Block (DAQ) 7；Signal source 1 connects sub-signal module 2, and sub-signal module 2 connects two-way output circuit, wherein circuit is direct all the way
Connecting detection sensor module 4 and signal interception module 5 are sequentially connected detection sensing after another way circuit connection phase shift block 3
Device 4 and signal interception module 5, two circuit connections are in signal synthesizing module 6, and signal synthesizing module 6 is through a signal output electricity
Road is connected with signal acquisition process module 7；
Signal source 1 is a sine wave exciting signal generating device, and the present embodiment always uses NI company PXI-5441 type
Waveform generator, for generating sine wave exciting signal；
Sub-signal module 2 receives the sine wave exciting signal that signal source generates, and sub-signal module 2 includes a voltage follow
Device plays the work of stabilization signal source output signal amplitude to eliminate influence of the load variation to exciting signal source output signal
With the voltage follower connects two delivery outlets, to export the identical sine-wave excitation letter of two-way amplitude, frequency, phase
Number give phase shift block and detection sensor module；
Phase shift block 3 includes a see-saw circuit, and see-saw circuit exports sub-signal module 2 is received all the way
Sine wave exciting signal carries out reverse phase processing, the sine wave exciting signal before reverse phase treated sine wave exciting signal and processing
Initial phase phase difference of pi；
Detection sensor module 4 includes that two loads need to be detected the sensor of substance, respectively corresponds and receives sub-signal mould
The sine wave exciting signal and 3 reverse phase of phase shift block treated sine wave exciting signal that block 2 exports, each sensor include electricity
Electrification holds antiresonant circuit and see-saw circuit, inductance capacitance antiresonant circuit are connected across the operation of see-saw circuit
Between amplifier out and inverting input terminal, the impedance of inductance capacitance antiresonant circuit is exported in a manner of reverse phase amplification；It is defeated
The variation delta Vout of signal amplitude is proportional to inductance capacitance antiresonant circuit impedance variation amount Δ Z out:
In each sensor, inductance coil is the circuit being composed in series by inductance and resistance, and inductance coil and capacitor form
Antiresonant circuit；The inductance coil of two sensors use identical specification, two inductance coils respectively with capacitor
It is worth identical capacitor parallel connection and forms two identical antiresonant circuits, guarantees that the detection having the same of two sensors is sensitive
Degree；
Signal interception module 5 includes two detector diodes with fast recovery characteristics, respectively corresponds reception detection sensing
The two-way sine wave signal that device module 4 exports, two detector diodes with fast recovery characteristics have one-way conduction effect, make
Only retain positive half cycle signal by the sine wave signal of signal interception module 5；
Signal synthesizing module 6 is a summing circuit, receives the two-way after signal interception module 5 intercepts and only retains positive half cycle
The sine wave signal of phase signal, and synthesized output signal all the way；
Signal acquisition process module 7 includes data acquisition card, and the present embodiment clock capture card is acquired using NI PXIe-6124
Output signal, data acquisition card and excitation are believed all the way for the synthesis that card uses synchronous sampling method acquisition signal synthesizing module 6 to export
For the work of number source under same reference clock, the signal that the frequency acquisition of adjustment signal capture card is twice in signal source generates frequency,
And the peak value of the sine wave by the output signal of the phase acquisition of the sampling clock of adjustment signal capture card to synthesis, after acquisition
Sine wave signal be analyzed and processed according to demand.
As shown in Fig. 2, the binary channels inductance sensor Simultaneous Detection based on phase shift technology, is issued by signal source
Sine wave exciting signal, which acts on load, to be had on two sensors of the metallic particles in oil liquid to be detected, and detecting step is as follows:
(1) sub-signal
Sinusoidal excitation signal 8 is divided into the identical sine of identical two-way by the sinusoidal excitation signal 8 that signal source signal generates
Wave excitation signal sub-signal 1 and sub-signal 2 10；
(2) phase shift is handled
Sub-signal 2 10 is subjected to reverse phase processing, the sub-signal two after reverse phase treated sine wave exciting signal, that is, phase shift
12 with the initial phase phase difference of pi of the sub-signal 2 10 before processing, the sub-signal of sub-signal 2 12 after phase shift and non-phase shift processing
One 11 initial phase phase difference of pi；
(3) sensor detects
Two loads need to be detected the sensor of substance, respectively correspond at sub-signal 2 12 and non-phase shift after receiving phase shift
The sub-signal 1 of reason；
(4) signal intercepts
The two-way sine wave signal for receiving detection sensor output is respectively corresponded, and intercepts two-way sine wave signal and only retains
Positive half cycle signal obtains the sub-signal 1 of positive interception and the sub-signal 2 14 of positive interception；
(5) signal synthesizes
The sub-signal 2 14 of the sub-signal 1 of positive interception and positive interception is synthesized into output signal all the way, is synthesized
Signal 15；
(6) signal acquisition process
Using the output signal all the way after synchronous sampling method acquisition synthesis, data acquisition card and signal source work are same
Under reference clock, the signal for making the frequency acquisition of data acquisition card be twice in signal source generates frequency, is acquired by adjustment signal
The phase acquisition of the sampling clock of card is to first via sensor output signal 16 and No. second sensor output signal 17, the first via
Sensor output signal 16 is the peak signal of first via detection sensor, and No. second sensor output signal 17 is the inspection of the second tunnel
The peak signal of sensor is surveyed, first via sensor output signal 16 and No. second sensor output signal 17 are processed into one
Image is shown that this image is the curve of output of sensor, is obtained with oil liquid by the pulse signal of detection curve
In metallic particles size and number, combining the flow velocity of oil liquid that can calculate the concentration of particle.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (4)
1. the binary channels inductance sensor based on phase shift technology while detection device, which is characterized in that including signal source, sub-signal
Module, phase shift block, detection sensor module, signal interception module, signal synthesizing module and signal acquisition process module,
In:
Signal source is for generating sine wave exciting signal；
Sub-signal module receives the sine wave exciting signal that signal source generates, and it is identical that the signal of exciting signal source is divided into two-way
Sine wave exciting signal；Sub-signal module includes a voltage follower, is exported to eliminate load variation to exciting signal source
Stabilization signal source output signal amplitude is played the role of in the influence of signal, and the voltage follower connects two delivery outlets, to
The identical sine wave exciting signal of two-way amplitude, frequency, phase is exported to phase shift block and detection sensor module；
Phase shift block includes a see-saw circuit, and see-saw circuit will receive the sine wave all the way of sub-signal module output
Pumping signal carries out reverse phase processing, reverse phase treated sine wave exciting signal with handle before sine wave exciting signal it is initial
Phase by pi；
Detection sensor module includes that two loads need to be detected the sensor of substance, respectively corresponds and receives the output of sub-signal module
Sine wave exciting signal and phase shift block reverse phase treated sine wave exciting signal, each sensor include inductance capacitance simultaneously
Join resonance circuit, inductance coil is the circuit being composed in series by inductance and resistance, the parallel resonance of inductance coil and capacitor composition
Circuit；
Signal interception module includes two diodes, respectively corresponds the two-way sine wave letter for receiving the output of detection sensor module
Number, two diodes have one-way conduction effect, make only to retain positive half cycle signal by the sine wave signal of signal interception module；
Signal synthesizing module includes a summing circuit, and the two-way after receiving the interception of signal interception module only retains positive half period letter
Number sine wave signal, and synthesized output signal all the way；
Signal acquisition process module includes data acquisition card, using synchronous sampling method, data acquisition card and exciting signal source work
Make under same reference clock, the signal that the frequency acquisition of adjustment signal capture card is twice in signal source generates frequency, and passes through
The phase acquisition of the sampling clock of adjustment signal capture card to synthesis output signal sine wave peak value, sine after acquisition
Wave signal is analyzed and processed according to demand.
2. detection device, feature exist the binary channels inductance sensor according to claim 1 based on phase shift technology simultaneously
In each sensor of the detection sensor module includes inductance capacitance antiresonant circuit and see-saw circuit, inductance
The impedance of capacitor antiresonant circuit exports in such a way that reverse phase is amplified；Inductance capacitance antiresonant circuit is connected across reverse phase amplification electricity
Between the operational amplifier output terminal and inverting input terminal on road.
3. detection device, feature exist the binary channels inductance sensor according to claim 2 based on phase shift technology simultaneously
In the inductance coil of two sensors of the detection sensor module uses identical specification, two inductance coils point
Two identical antiresonant circuits of capacitor formation in parallel not identical with capacitance, guarantee two sensor inspections having the same
Survey sensitivity.
4. detection device, feature exist the binary channels inductance sensor according to claim 1 based on phase shift technology simultaneously
In the diode of the signal interception module is the detector diode with fast recovery characteristics.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243736A (en) * | 2019-07-30 | 2019-09-17 | 大连海事大学 | A kind of inductance type hydraulic oil abrasive grain differentiation monitoring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243736A (en) * | 2019-07-30 | 2019-09-17 | 大连海事大学 | A kind of inductance type hydraulic oil abrasive grain differentiation monitoring device |
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