CN208383050U - Liquid detecting device and liquid detection system - Google Patents
Liquid detecting device and liquid detection system Download PDFInfo
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- CN208383050U CN208383050U CN201820710330.3U CN201820710330U CN208383050U CN 208383050 U CN208383050 U CN 208383050U CN 201820710330 U CN201820710330 U CN 201820710330U CN 208383050 U CN208383050 U CN 208383050U
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- 239000007788 liquid Substances 0.000 title claims abstract description 141
- 238000001514 detection method Methods 0.000 title claims abstract description 43
- 239000000523 sample Substances 0.000 claims abstract description 86
- 239000003990 capacitor Substances 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 8
- 238000011897 real-time detection Methods 0.000 claims description 5
- 230000006872 improvement Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a kind of liquid detecting device and liquid detection system.Liquid detecting device includes: capacitance probe comprising end of probe and receiving end form capacitor between end of probe and receiving end, capacitance probe can be subjected to displacement relative to liquid, and electric current is capable of forming when end of probe touches liquid；Current probe is configured to be electrically connected with capacitance probe, the electric current in circuit where being able to detect capacitance probe；Processor is configured to be electrically connected with current probe, can analyze the variation tendency for the electric current that current probe detects in the given time, and judge motion state of the liquid detecting device relative to liquid.Liquid detection system includes aforesaid liquid detection device.The utility model utilizes the storage characteristic of capacitor, when the charge in one pole of capacitor changes, the characteristic of electric current is generated in capacitor loop, to judge liquid or other positions with conductive characteristic object.
Description
Technical field
The utility model belongs to technical field of automation equipment, and in particular to a kind of liquid detecting device and liquid detection system
System.
Background technique
Liquid Detection Techniques are used as the technology of automation equipment core all the time, have obtained quick development in recent years.
Wherein the most widely used is pressure type Detection Techniques and condenser type Detection Techniques.Condenser type Detection Techniques are relative to pressure type
For Detection Techniques, have equipment volume it is small, remote transmission easy to accomplish and adjust the advantages of, be applicable to corrosivity
With the liquid measure of the medium of high pressure characteristics.
Condenser type detector liquid common at present is by the way of the variation of measurement capacitor, to measure the position of liquid.
It is used in container of a metal bar insertion holding liquid, at this time a pole of the metal bar as capacitor, and chamber wall then conduct
Another pole of capacitor.Two interelectrode media, the gas above liquid and liquid as to be measured.
Since the permittivity ε 2 of the gas above the permittivity ε 1 and liquid of liquid is different, as 1 > ε 2 of ε, if liquid
Face increases, then dielectric constant values total between two electrodes can then increase therewith, and capacitance is caused to increase with it., whereas if liquid level
Decline, then two interelectrode dielectric constant values can then reduce therewith, and capacitance is caused also to reduce.Thus, it is possible to pass through two electrodes
Between the variation of capacitance value measure the position of liquid.
But the limitation of existing condenser type detector liquid is more.Firstly, its sensitivity is more difficult to control, existing capacitor
The sensitivity of formula detector liquid depends primarily on the difference of the dielectric constant of liquid and liquid overhead gas, and only dielectric is normal
It just can guarantee the accurate of liquid position measurement when number ε 1 and ε 2 constant.Secondly, because how conductive measured medium is, so metal
Bar electrode has insulating layer covering, so its object weak to electric conductivity does not have yet finds out ability well.
Summary of the invention
The purpose of this utility model is to provide a kind of liquid detecting devices.
To achieve the goals above, technical solution provided by the embodiment of the utility model is as follows: a kind of liquid detecting device,
It include: capacitance probe comprising end of probe and receiving end form capacitor, capacitance probe energy between end of probe and receiving end
It is enough to be subjected to displacement relative to liquid, and electric current is capable of forming when end of probe touches liquid；Current probe is configured to and electricity
Hold detector to be electrically connected, the electric current in circuit where being able to detect capacitance probe；Processor is configured to and current probe electricity
Property connection, the variation tendency for the electric current that current probe detects in the given time can be analyzed, and judge liquid detection dress
Set the motion state relative to liquid.
Capacitance probe further includes mechanical arm as a further improvement of the utility model, is configured to drive
Capacitance probe is subjected to displacement relative to liquid.
Liquid detecting device further includes charging unit as a further improvement of the utility model, is filled for capacitance probe
Electricity.
The technical solution that another embodiment of the utility model provides is as follows: a kind of liquid detection system, and system includes as above
Any liquid detecting device, and: charging module, for charging for capacitance probe；Module is obtained, for real-time detection electricity
The electric current in circuit where holding detector；Processing module, for judging the relative position of liquid detecting device and liquid according to electric current
Relationship.
Processing module is specifically used for as a further improvement of the utility model: when detecting electric current, judging that liquid is visited
The end of probe for surveying device touches liquid.
Processing module is also used to as a further improvement of the utility model: according to the variation tendency of electric current, judging liquid
Motion state of the detection device relative to liquid.
Processing module is specifically used for as a further improvement of the utility model: when detection current value within a certain period of time
When for a definite value, judge that liquid detecting device is unchanged relative to the position of liquid.
Processing module is specifically used for as a further improvement of the utility model: when detection current value within a certain period of time
It first incrementally increases, when gradually reducing after arrival highest point, judges that liquid detecting device gradually touches liquid.
Processing module is specifically used for as a further improvement of the utility model: when detection current value within a certain period of time
It gradually reduces, judges that liquid detecting device leaves from liquid.
The beneficial effects of the utility model are:
The utility model utilizes the storage characteristic of capacitor, when the charge in one pole of capacitor changes, produces in capacitor loop
The characteristic of raw electric current has good in anti-interference performance to judge liquid or other positions with conductive characteristic object, and detection is steady
Qualitative good feature；And the object weak for electric conductivity also has the good ability of finding out, the work suitable for all detection properties
In standing.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments recorded in the utility model, for those of ordinary skill in the art, is not making the creative labor
Under the premise of, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic illustration of liquid detecting device provided by the utility model；
Fig. 2 is the workflow schematic diagram of liquid detecting device provided by the utility model；
Fig. 3 is the curent change tendency chart that liquid detecting device provided by the utility model detects；
Fig. 4 is the structural schematic diagram of liquid detection system provided by the utility model.
Specific embodiment
The utility model is described in detail below with reference to specific embodiment shown in the drawings.But these embodiment party
Formula is not intended to limit the utility model, structure that those skilled in the art are made according to these embodiments, method or
Transformation functionally is all contained in the protection scope of the utility model.
Referring to Figure 1, the liquid detecting device 1 that one embodiment of the utility model provides, including mechanical arm is (in figure not
Show), charging unit (not shown)；Capacitance probe；And current probe 11.
Wherein, mechanical arm is used to that capacitance probe to be driven to move towards close to the direction of liquid 2 or separate liquid 2.
Charging unit for giving capacitance probe charging, when capacitance probe the output voltage with voltage equal to charging unit when, fill
Electricity is completed.Capacitance probe is set to liquid detecting device 1 towards the side of quantity of fluid 2 to be measured, including end of probe 12 and reception
End 13, end of probe 12 and receiving end 13 form capacitor, and the length of end of probe 12 is greater than the length of receiving end 13, fill when liquid detects
1 is set towards when the movement of liquid 2, end of probe 12 is used for contact liq 2, detects the position of liquid 2.Current probe 11 and capacitor are visited
It surveys device to be electrically connected, for the electric current in measure loop.
It is capacitance probe charging by charging unit before detection behavior occurs.When starting detection behavior, liquid
Detection device 1 is mobile towards liquid 2, and when end of probe 12 comes into contact with liquid, the charge in end of probe 12 is led by liquid 2
Out, capacitor both ends form electric current.The electric current generated in 11 measure loop of current probe.
In preferred embodiments of the present invention, liquid detecting device further includes processor.Processor is for analyzing
The variation tendency for the electric current that current probe 11 detects in the given time, the variation tendency based on electric current, to judge liquid
Motion state of the detection device 1 relative to liquid 2, that is, can determine whether the relative positional relationship between liquid detecting device and liquid 2.
Please also refer to Fig. 3, after detection starts, if the electric current that current probe 11 detects incrementally increases, continue
Certain time, then current values gradually declined until current values peak；That is the variation tendency of electric current meets Fig. 3 song
When the variation tendency of line B, processor judge liquid detecting device 1 to move towards the direction of liquid 2, and end of probe 12 exists
Gradually it is inserted into liquid 2.
After detection starts, if the electric current that current detector 11 detects is in steady state always, without larger amplitude
The increase or reduction of degree；That is when the variation tendency of electric current meets the variation tendency of Fig. 3 curve A, then processor may determine that this
When end of probe 12 belong to normal power shortage state, liquid detecting device 1 is mobile without position.
After detection starts, if the electric current that current detector 11 detects is larger at the beginning of detection, with when
Between swelling current numerical value gradually decline, i.e. when the variation tendency of electric current meets the variation tendency of Fig. 3 curve C, processor can be sentenced
The direction that disconnected liquid detecting device 1 is being directed away from liquid is mobile, and liquid is gradually left in the beginning of end of probe 12.
Fig. 2 is referred to, the utility model provides a kind of liquid detecting method.The liquid detecting method includes:
S1, it charges for capacitance probe；Capacitance probe includes two conductive metal poles arranged in parallel, is being powered
Afterwards, two of capacitance probe extremely on carry the positive and negative charge of equal amount respectively, form voltage.It occurs in detection behavior
Before, it is capacitance probe charging by charging unit.When the voltage of two interpolar of capacitance probe is equal to the output electricity of charging unit
When pressure, capacitance probe charging is finished.
The electric current in circuit where capacitance probe described in S2, real-time detection；By in current probe real-time detection circuit
Electric current.
The electric current that S3, basis detect, judges the positional relationship of liquid detecting device and liquid.In capacitance probe
Charging finishes, and when capacitance probe is not in contact with to conducting liquid or other conductive bodies, does not have electric current flowing in circuit.Work as electricity
When appearance detector touches conducting liquid or other conductive bodies, the charge on capacitance probe is exported, can shape in circuit
At electric current.Processor is according to whether detect that there are electric currents in circuit, judge the positional relationship of liquid detecting device and liquid.
Preferably, the method also includes: according to the variation tendency of the electric current, judge the movement shape of liquid detecting device
State.When the current value that current probe detects is a definite value within a certain period of time, the liquid detecting device is judged
Position is unchanged.When the current value that current probe detects first incrementally increases within a certain period of time, reach after highest point by
When step reduces, judge that the liquid detecting device gradually touches liquid.It is gradually reduced within a certain period of time when detecting current value,
Judge that the liquid detecting device leaves from liquid.
Fig. 4 is referred to, the utility model provides a kind of liquid detection system.The system comprises aforementioned liquids detections to fill
It sets, and: charging module 100 obtains module 200, processing module 300.
Charging module 100 is used to charge for capacitance probe；Capacitance probe includes two conductions arranged in parallel
Metal pole, after powered up, two extremely on carry the positive and negative charge of equal amount respectively, form voltage.Detecting behavior
It before, is capacitance probe charging by charging unit.When the voltage of two interpolar of capacitance probe is equal to the output of charging unit
When voltage, capacitance probe charging is finished.
Obtain electric current of the module 200 for circuit where capacitance probe described in real-time detection；Pass through current probe reality
When measure loop in electric current.
Processing module 300 judges the relative positional relationship of liquid detecting device and liquid according to the electric current detected.
It finishes in capacitance probe charging, and when capacitance probe is not in contact with to conducting liquid or other conductive bodies, does not have in circuit
Electric current flowing.When capacitance probe touches conducting liquid or other conductive bodies, the charge on capacitance probe is led
Out, it will form electric current in circuit.Current probe according to whether detect in circuit there are electric current, judge liquid detecting device with
The positional relationship of liquid.
Preferably, processing module 300 is also used to the variation tendency according to the electric current, judges the movement of liquid detecting device
State.When the current value that current probe detects is a definite value within a certain period of time, the liquid detecting device is judged
Position it is unchanged.When the current value that current probe detects first incrementally increases within a certain period of time, after arrival highest point
When gradually reducing, judge that the liquid detecting device gradually touches liquid.When detection current value gradually subtracts within a certain period of time
It is small, judge that the liquid detecting device leaves from liquid.
In conclusion the utility model utilizes the storage characteristic of capacitor, when the charge in one pole of capacitor changes, capacitor
The characteristic of electric current is generated in circuit, and to judge liquid or other positions with conductive characteristic object, there is interference free performance
It is good, the good feature of detection stability；And the object weak for electric conductivity also has the good ability of finding out, and is suitable for all detections
In the work station of property.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model
Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model
Equivalent implementations or change should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of liquid detecting device, which is characterized in that the liquid detecting device includes:
Capacitance probe comprising end of probe and receiving end form capacitor between the end of probe and receiving end, the capacitor is visited
Surveying device can be subjected to displacement relative to liquid, and be capable of forming electric current when the end of probe touches liquid；
Current probe is configured to be electrically connected with the capacitance probe, the electricity in circuit where being able to detect capacitance probe
Stream；
Processor is configured to be electrically connected with current probe, can analyze the current probe and detect in the given time
The variation tendency of the electric current arrived, and judge motion state of the liquid detecting device relative to liquid.
2. liquid detecting device according to claim 1, which is characterized in that the capacitance probe further includes manipulator
Arm is configured to that the capacitance probe is driven to be subjected to displacement relative to liquid.
3. liquid detecting device according to claim 1, which is characterized in that the liquid detecting device further include: charging
Device charges for the capacitance probe.
4. a kind of liquid detection system, which is characterized in that the system comprises liquid detecting device as described in claim 1,
And:
Charging module, for charging for capacitance probe；
Module is obtained, the electric current for circuit where capacitance probe described in real-time detection；
Processing module, for judging the relative positional relationship of liquid detecting device and liquid according to the electric current.
5. liquid detection system according to claim 4, which is characterized in that
The processing module is specifically used for:
When detecting electric current, judge that the end of probe of the liquid detecting device touches liquid.
6. liquid detection system according to claim 4, which is characterized in that
The processing module is also used to: according to the variation tendency of the electric current, judging fortune of the liquid detecting device relative to liquid
Dynamic state.
7. liquid detection system according to claim 6, which is characterized in that
The processing module is specifically used for: when detect current value is a definite value within a certain period of time, judging that the liquid is visited
It is unchanged relative to liquid to survey device.
8. liquid detection system according to claim 6, which is characterized in that
The processing module is specifically used for:
When detection current value first incrementally increases within a certain period of time, and arrival highest point gradually reduces later, the liquid is judged
Detection device gradually touches liquid.
9. liquid detection system according to claim 6, which is characterized in that
The processing module is specifically used for: gradually reducing within a certain period of time when detecting current value, judges the liquid detection dress
It sets and is left from liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820710330.3U CN208383050U (en) | 2018-05-14 | 2018-05-14 | Liquid detecting device and liquid detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820710330.3U CN208383050U (en) | 2018-05-14 | 2018-05-14 | Liquid detecting device and liquid detection system |
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| Publication Number | Publication Date |
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| CN208383050U true CN208383050U (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820710330.3U Expired - Fee Related CN208383050U (en) | 2018-05-14 | 2018-05-14 | Liquid detecting device and liquid detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775856A (en) * | 2018-05-14 | 2018-11-09 | 兰州天启基因生物科技有限公司 | Liquid detecting device, liquid detecting method and liquid detection system |
-
2018
- 2018-05-14 CN CN201820710330.3U patent/CN208383050U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775856A (en) * | 2018-05-14 | 2018-11-09 | 兰州天启基因生物科技有限公司 | Liquid detecting device, liquid detecting method and liquid detection system |
| CN108775856B (en) * | 2018-05-14 | 2024-06-11 | 海宁博上生物科技股份有限公司 | Liquid detection device, liquid detection method and liquid detection system |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |