CN109506737A - A kind of level measuring method, device and equipment, liquid level detection circuit - Google Patents
A kind of level measuring method, device and equipment, liquid level detection circuit Download PDFInfo
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- CN109506737A CN109506737A CN201811162318.4A CN201811162318A CN109506737A CN 109506737 A CN109506737 A CN 109506737A CN 201811162318 A CN201811162318 A CN 201811162318A CN 109506737 A CN109506737 A CN 109506737A
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- 238000001514 detection method Methods 0.000 title claims abstract description 93
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- 239000003990 capacitor Substances 0.000 claims description 23
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
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Abstract
The present invention discloses a kind of level measuring method, device and equipment, liquid level detection circuit, wherein liquid level emasuring device includes level probe, liquid level detection circuit, master controller；Level probe is placed in container, and the top of level probe, the shell of container are connect with liquid level detection circuit respectively；Master controller is connect with liquid level detection circuit, and the electrical parameter for being exported according to liquid level detection circuit determines the liquid level in container.Thus, it is possible to realize the continuous detection of water level, and level probe compared to infrared sensor for, service life is longer, design is more simple, and cost-saved, accuracy is higher.
Description
Technical field
The present invention relates to machine set technology fields, in particular to a kind of level measuring method, device and equipment, liquid level
Detection circuit.
Background technique
Currently, mostly using the liquid such as infrared sensor type or condenser type when detecting the height of liquid level in the containers such as insulating pot
Position detecting method.The principle of infrared sensor type is that infrared waves sending device can emit infrared waves, and infrared waves are touching liquid level
It reflects afterwards, the infrared waves of reflection are received by infrared sensor, can be according to the time difference of transmitting infrared waves and reception infrared waves
Deng the height because usually judging liquid level.And the principle of condenser type detection method is, when liquid level increases, between capacitor two-plate away from
Become smaller from increase, capacitor, then can detect capacitor according to this corresponding relationship, and judge the height of liquid level.Though both the above method
It can so realize the detection of liquid level, but higher cost, and since reflection process or capacitor change with distance between polar plate
Process it is larger by such environmental effects, accuracy is lower.
For the lower problem of the mode higher cost and accuracy of sensed water level in the related technology, not yet propose at present
Effective solution scheme.
Summary of the invention
Mode higher cost and accuracy to solve the problems, such as sensed water level in the prior art is lower.In a first aspect,
The embodiment of the invention provides a kind of liquid level emasuring device, the liquid level emasuring device include level probe, liquid level detection circuit,
Master controller；
The level probe is placed in container, the top of the level probe, the container shell respectively with it is described
Liquid level detection circuit connection；
The master controller is connect with the liquid level detection circuit, the electricity for being exported according to the liquid level detection circuit
Parameter is learned, determines the liquid level in the container.
Further, the liquid level detection circuit, for exporting corresponding electricity when the liquid level is in different height
Parameter；Wherein, the contact area when the liquid level is in different height, in the level probe and the container between liquid
It is different to further result in the electrical parameter for difference.
Further, when the electrical parameter is voltage, the contact area is bigger, then contact impedance is smaller, into one
Step causes the voltage of output smaller.
Further, the contact area is greater than preset threshold.
Further, the master controller determines institute for the preset relation according to the electrical parameter and the liquid level
State the liquid level in container.
Further, the preset relation are as follows: when the electrical parameter is consistent with driving electrical parameter, determine the liquid
Position is lower than the first default liquid level；
When the electrical parameter and the driving electrical parameter are inconsistent, have between the electrical parameter and the liquid level
There is the first preset relation；Wherein, first preset relation includes at least one of: linear relationship, inversely prroportional relationship；It is described
Driving electrical parameter is that the master controller is exported to the liquid level detection circuit, to drive the liquid level detection circuit work
Electrical parameter.
Further, the container further include: heating device,
The master controller is connect with the heating device, is also used to the heating instructions in the container reception to user
Afterwards, determine whether the liquid level is greater than or equal to the first default liquid level, if it is, controlling the heating device work.
Further, the container further include: warning device,
The master controller is connect with the warning device, for when determining the liquid level less than the first default liquid level,
Control the warning device alarm.
Further, the container further include:
Display panel is connect with the master controller, for showing the liquid level in the container；
The master controller is also used to control the display panel when determining the liquid level less than the first default liquid level
Display reminding information, wherein the prompt information is for prompting user to add water to the container.
Further, the container is insulating pot, and the shell of the container is conductor.
Further, the top of the top of the level probe and the container maintains an equal level, the bottom of the level probe with
The distance of the bottom of the container is more than the first pre-determined distance, and the level probe is conductor.
Further, the level probe is following at least one: taper level probe, cylindrical level probe.
Second aspect, the embodiment of the present invention provide a kind of liquid level detection circuit, and the liquid level detection circuit is applied to first
In liquid level emasuring device described in aspect,
There is the liquid level detection circuit inserting terminal CN1, the inserting terminal CN1 to have multiple interfaces；Liquid level is visited
The shell of container is connected from the different interfaces of the inserting terminal CN1 respectively where the top of needle, the liquid level emasuring device；
So that the level probe passes through the liquid in the container, the structure together with the liquid level detection circuit, the container casing
At closed circuit；
The output end of the liquid level detection circuit is connect with master controller, is in difference for liquid level in the container
Corresponding electrical parameter is exported when height to the master controller.
Further, the contact surface when the liquid level is in different height, between the level probe and the liquid
Product is different, and the contact area is bigger, then contact impedance is smaller, and it is smaller to further result in the electrical parameter.
Further, the input terminal of the liquid level detection circuit is connect with the master controller, for receiving the master control
The driving electrical parameter of device input processed.
Further, the drive waveforms of the driving electrical parameter are the triangular wave with specific frequency F and amplitude and specific
At least one of waveform, square-wave waveform, sine and cosine waveform.
Further, the liquid level detection circuit includes first resistor R1, first capacitor C1, the second capacitor C2, third electricity
Hold C3 and second resistance R5, wherein the R1, the C1, the C3, the R5 be connected in series, the C1, the C2 and
The C3 is connected in parallel；The C1 is for obstructing direct current signal；The C2, the C3 are used to filter；The R5, for limiting
Stream；The liquid level detection circuit further includes ground terminal, is connect with the intersection point that converges of the C1, the C2, the C3.
Further, when the electrical parameter of the output, the driving electrical parameter are voltage, the electrical parameter
It can be determined by following formula:
Utemp=Uvcc*R/ (R+R1)；
Wherein, Utemp is the electrical parameter of output, Uvcc is driving electrical parameter, and R is contact impedance；
In direct current liquid level detection circuit, R is purely resistive impedance, i.e., impedance when probe and liquid contact；
In AC liquid level detection circuit, it further includes capacitor C between probe is contacted with liquid that R, which is non-purely resistive impedance,
Capacitive reactance RCThe capacitive reactance R of capacitor C1 in=1/ (2 π f C) and circuitC1=1/ (2 π f C1), wherein π ≈ 3.14, f are Uvcc driving electricity
The frequency of pressure, C, C1 are capacitor's capacity.
The third aspect, the embodiment of the present invention provide a kind of level measuring method, and the method is applied to described in first aspect
Liquid level emasuring device in, which comprises
Obtain the electrical parameter of liquid level detection circuit output；
The liquid level in container is determined according to the electrical parameter；Wherein, level probe, the liquid are placed in the container
The top of position probe, the shell of the container are connect with the liquid level detection circuit respectively.
Further, the electrical parameter has different values when the liquid level is in different height.
Further, the electrical parameter is voltage.
Further, determine that the liquid level in container includes: according to the electrical parameter
According to the preset relation of the electrical parameter and the liquid level, the liquid level in the container is determined.
Further, the preset relation are as follows: when the electrical parameter is consistent with driving electrical parameter, determine the liquid
Position is lower than the first default liquid level；
When the electrical parameter and the driving electrical parameter are inconsistent, have between the electrical parameter and the liquid level
There is the first preset relation；Wherein, first preset relation includes at least one of: linear relationship, inversely prroportional relationship；
The driving electrical parameter is the electrical parameter to drive the liquid level detection circuit work.
Further, the method also includes:
Receive the heating instructions of user；
Determine whether the liquid level is greater than or equal to the first default liquid level, if it is, triggering the heating behaviour of the container
Make.
Further, after determining the liquid level in container according to the electrical parameter, the method also includes:
When determining the liquid level less than the first default liquid level, the alarm operation of the container is triggered.
Further, after determining the liquid level in container according to the electrical parameter, the method also includes:
Trigger the display operation of the container；
When determining the liquid level less than the first default liquid level, the container display reminding information is triggered, wherein described to mention
Show information for prompting user to add water to the container.
Fourth aspect, the embodiment of the present invention provide a kind of equipment, and the equipment includes level gauging described in first aspect
Device, the equipment are air conditioner.
It applies the technical scheme of the present invention, liquid level emasuring device includes level probe, liquid level detection circuit, master controller；
Level probe is placed in container, and the top of level probe, the shell of container are connect with liquid level detection circuit respectively；Main control
Device is connect with liquid level detection circuit, and the electrical parameter for being exported according to liquid level detection circuit determines the liquid level in container.By
This, may be implemented the continuous detection of water level, and level probe compared to infrared sensor for, service life is longer, is related to more
Cost-saved to be simple, accuracy is higher.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of liquid level emasuring device according to an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of liquid level emasuring device placement according to an embodiment of the present invention in a reservoir；
Fig. 3 is a kind of structural block diagram of liquid level emasuring device according to an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of liquid level detection circuit according to an embodiment of the present invention；
Fig. 5 is a kind of drive waveforms schematic diagram for driving electrical parameter according to an embodiment of the present invention；
Fig. 6 is a kind of flow chart of level measuring method according to an embodiment of the present invention；
Fig. 7 is a kind of flow chart of level measuring method according to an embodiment of the present invention.
Specific embodiment
Present invention is further described in detail in the following with reference to the drawings and specific embodiments, it should be understood that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
In subsequent description, it is only using the suffix for indicating such as " module ", " component " or " unit " of element
Be conducive to explanation of the invention, itself there is no a specific meaning.Therefore, " module ", " component " or " unit " can mix
Ground uses.
Mode higher cost and accuracy in order to solve the problems, such as sensed water level in the prior art is lower.Such as Fig. 1 institute
Show, the embodiment of the present invention provides a kind of liquid level emasuring device, liquid level emasuring device include level probe 1, liquid level detection circuit 2,
Master controller 3；
Level probe 1 is placed in container, and the top of level probe 1, the shell of container connect with liquid level detection circuit 2 respectively
It connects；
Master controller 3 is connect with liquid level detection circuit 2, the electrical parameter for being exported according to liquid level detection circuit 2, really
Liquid level in constant volume device.
Thus, it is possible to realize the continuous detection of water level, and level probe 1 compared to infrared sensor for, service life
It is longer, be related to more simple, cost-saved, accuracy is higher.
It should be noted that in the related technology can also in kettle equidistantly distributed test point, to determine water level, but this
Method obviously can not achieve the continuous detection to water level.In one possible implementation, level probe 1 can be taper liquid
Position probe 1 or cylindrical level probe 1, when liquid level emasuring device is placed in container (such as: insulating pot), level probe 1
It can place, can also need to only be guaranteed when the liquid level in container increases, level probe with slant setting in an angle of 90 degrees with container bottom
Gradually increase the part of 1 submergence in a liquid.And the top of level probe 1, the shell of container can pass through signal wire respectively
It is connect with liquid level detection circuit 2, to constitute circuit.Liquid level detection circuit 2 is corresponded to for exporting when liquid level is in different height
Electrical parameter；Wherein, when liquid level is in different height, the contact area between level probe 1 and liquid in container is different,
Further result in electrical parameter difference.When electrical parameter is voltage, contact area is bigger, then contact impedance is smaller, further
Cause the voltage of output smaller.
Wherein, contact area can be greater than preset threshold, to guarantee that correlated variables, such as the numerical value of contact impedance have more
Apparent variation, is conducive to subsequent measurement, and reduce error indirectly.Wherein, level probe 1 is conductor, the bottom of the shell of container
Portion or side can connect (as shown in Figure 2) with liquid level detection circuit 2 by signal wire, and the top of level probe 1 and appearance
The top of device maintains an equal level, so that measurable liquid level range is sufficiently large.And the bottom of level probe 1 is at a distance from the bottom of container
More than the first pre-determined distance (as shown in Figure 2), as a result, when the liquid level in container does not touch 1 bottom of level probe, liquid level
Detection circuit 2 is in off state, and the voltage of output is the input voltage (driving voltage) of liquid level detection circuit 2, at this point, can be true
Water shortage in constant volume device, then can be reminded, and cause container damage to avoid dry combustion method.
Wherein, probe shown in Fig. 2 is taper level probe 1, and the bottom of container casing is connected with signal wire.
It is understood that liquid level emasuring device can be integrated in container (insulating pot), for measuring the liquid level in container,
It can also be used as individual product, for the level measuring in remaining scene, the present invention is without limitation.It is understood that
It is, as shown in Fig. 2, contact area is gradually increased and amplification is also gradually increased when liquid level gradually rises, then contact impedance
Variation can be more obvious, is conducive to subsequent measurement, and reduce error indirectly.
In one possible implementation, master controller 3, for the preset relation according to electrical parameter and liquid level, really
Liquid level in constant volume device.Wherein, preset relation are as follows: when electrical parameter is consistent with driving electrical parameter, determine liquid level lower than the
One default liquid level；There is the first default pass in electrical parameter and inconsistent driving electrical parameter, between electrical parameter and liquid level
System；Wherein, the first preset relation includes at least one of: linear relationship, inversely prroportional relationship；Driving electrical parameter is main control
The output of device 3 is to liquid level detection circuit 2, with the electrical parameter for driving liquid level detection circuit 2 to work.
It is understood that when electrical parameter is consistent with driving electrical parameter, illustrate the bottom of level probe 1 not in contact with
To liquid, liquid level detection circuit 2 is in breaking detecting state.It then can determine that liquid level is lower than the first default liquid level in container, can manage
Solution, the first default liquid level are equal with the first pre-determined distance in above-described embodiment.And if electrical parameter and driving electricity
Parameter is inconsistent, then illustrates that the liquid level in container at this time is more than the first default liquid level, and with the raising of liquid level, level probe 1
It will increase with the contact area of liquid in container, then contact impedance can reduce, then utilize ohmic, and the electricity of output is joined
Numerical example such as voltage, can also reduce.That is, electrical parameter can decrease when liquid level increases.And have therebetween bright
True numerical value corresponding relationship, then master controller 3 can utilize this first preset relation, and according to the electrical parameter received, determine
The liquid level of container.It can be realized as a result, by the structure and principle of ohmic and level probe 1 to the continuous of liquid level
Detection, and scheme is relatively simple, cost is relatively low, and intelligent and user experience can be improved.
In one possible implementation, by taking insulating pot as an example, settable liquid level emasuring device insulating pot energization after,
It can then work, thus, it is possible to realize the real-time continuous detection of liquid level.
In one possible implementation, container further include: heating device (in figure for show), master controller 3 and add
Thermal connection, is also used to after the heating instructions of container reception to user, and it is default to determine whether liquid level is greater than or equal to first
Liquid level, if it is, control heating device work.Container further include: warning device 5, master controller 3 connect with warning device 5
It connects, for when determining liquid level less than the first default liquid level, control warning device 5 to be alarmed.Container further include: display panel 4, with
Master controller 3 connects, for showing the liquid level in container；Master controller 3 is also used to determining liquid level less than the first default liquid level
When, control the display panel 4 display reminding information, wherein prompt information is for prompting user to add water to container.
Wherein, when liquid level is greater than or equal to the first default liquid level, illustrate that liquid level is within the scope of safety levels at this time, no
The heating instructions of user then can be performed in the case where will appear dry combustion method.And user may participate in setting display mode, that is, display surface is arranged
4 real-time display liquid level of plate, can also show liquid level at times, can also pinpoint display liquid level.And conversely, then easily there is dry combustion method shape
Condition, can No starting heating device, as shown in figure 3, and by warning device 5, as buzzer 5 is alarmed.It can also control
4 display reminding information of display panel, to remind user to add water.It will be appreciated that prompting mode can also by voice broadcast, refer to
Show that lamp is carried out by modes such as specific frequency flashings.And be wirelessly connected if insulating pot can be realized with terminal, it can directly trigger shifting
Dynamic terminal (such as: mobile phone) user is reminded, it further improves intelligence and protects container, saved the energy.
In one possible implementation, as shown in figure 4, the embodiment of the present invention also provides a kind of liquid level detection circuit 2,
Liquid level detection circuit 2 is applied in liquid level emasuring device shown in above-described embodiment, and liquid level detection circuit 2 has inserting terminal
CN1, inserting terminal CN1 have multiple interfaces；The top of level probe 1, the shell of liquid level emasuring device place container are distinguished
Pass through signal wire interface connection different from inserting terminal CN1's；So that level probe 1 passes through the liquid and liquid in container
Position detection circuit 2, container casing constitute closed circuit together；The output end of liquid level detection circuit 2 is connect with master controller 3, is used
Corresponding electrical parameter is exported when the liquid level in container is in different height to master controller 3.Wherein, CN1 is liquid level
1 interface circuit of probe.
In one possible implementation, the contact when liquid level is in different height, between level probe 1 and liquid
Area is different, and contact area is bigger, then contact impedance is smaller, and it is smaller to further result in electrical parameter.That is contact impedance and electricity
Parameter is positively correlated.
In one possible implementation, the input terminal of liquid level detection circuit 2 is connect with master controller 3, for receiving
The driving electrical parameter that master controller 3 inputs.
In one possible implementation, as shown in figure 5, the drive waveforms of driving electrical parameter are with specific frequency
At least one of the triangular wave waveform of F and amplitude and specific, square-wave waveform, sine and cosine waveform.Thus, it is possible to delay level probe
1 due to forming scale with water Long Term Contact.In one possible implementation, liquid level detection circuit 2 includes first resistor
R1, first capacitor C1, the second capacitor C2, third capacitor C3 and second resistance R5, wherein R1, C1, C3, R5 are connected in series,
C1, C2 and C3 are connected in parallel；C1 is for obstructing direct current signal；C2, C3 are used to filter；R5 is used for current limliting；Level sensing electricity
Road 2 further includes ground terminal, is connect with the intersection point that converges of C1, C2, C3.
Wherein, each component can be deleted according to the actual situation, and the present invention is without limitation.
In one possible implementation, when the electrical parameter of output, driving electrical parameter are voltage, electricity ginseng
Number can be determined by following formula: Utemp=Uvcc*R/ (R+R1)；
Wherein, Utemp is the electrical parameter of output, Uvcc is driving electrical parameter, and R is contact impedance, it is possible to understand that
It is that liquid level detection circuit 2 can be AC liquid level detection circuit 2.In AC liquid level detection circuit, R is non-purely resistive impedance,
It further include the capacitive reactance R of capacitor C between probe is contacted with liquidCThe capacitive reactance R of capacitor C1 in=1/ (2 π f C) and circuitC1=1/ (2 π
F C1), wherein π ≈ 3.14, f are the frequency of Uvcc driving voltage, C, C1 are capacitor's capacity.In direct current liquid level detection circuit, R
For purely resistive impedance, i.e., impedance when probe and liquid contact, then the filter capacitor in above-mentioned implementation obstructs direct current signal
Capacitor can remove.
The embodiment of the present invention also provides a kind of level measuring method, and method is applied to level gauging shown in above-described embodiment
In device, as shown in fig. 6, method includes:
Step S601, the electrical parameter of liquid level detection circuit output is obtained；
Step S602, the liquid level in container is determined according to electrical parameter；Wherein, level probe, liquid level are placed in container
The top of probe, the shell of container pass through signal wire respectively and connect with liquid level detection circuit.
Thus, it is possible to realize the continuous detection of water level, and level probe compared to infrared sensor for, service life compared with
It is long, be related to more simple, cost-saved, accuracy is higher.
In one possible implementation, electrical parameter has different values when liquid level is in different height.Electricity
Parameter is voltage.
In one possible implementation, step S602, determine that the liquid level in container includes: basis according to electrical parameter
The preset relation of electrical parameter and liquid level determines the liquid level in container.
In one possible implementation, preset relation are as follows: when electrical parameter is consistent with driving electrical parameter, determine
Liquid level is lower than the first default liquid level；In electrical parameter and inconsistent driving electrical parameter, have between electrical parameter and liquid level
First preset relation；Wherein, the first preset relation includes at least one of: linear relationship, inversely prroportional relationship；Drive electricity ginseng
Number is to the electrical parameter for driving liquid level detection circuit to work.
In one possible implementation, method further include: receive the heating instructions of user；Determine whether liquid level is greater than
Or it is equal to the first default liquid level, if it is, the heating operation of triggering container.
In one possible implementation, as shown in fig. 7, being determined in container in step S602, according to electrical parameter
Liquid level after, method further include:
Step S603, when determining liquid level less than the first default liquid level, the alarm operation of container is triggered.
In one possible implementation, after determining the liquid level in container according to electrical parameter, method further include:
Trigger the display operation of container；When determining liquid level less than the first default liquid level, container display reminding information is triggered, wherein mention
Show information for prompting user to add water to container.
The embodiment of the present invention also provides a kind of equipment, and equipment includes liquid level emasuring device described in above-described embodiment, if
Standby is air conditioner.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a mobile terminal (can be mobile phone, computer, clothes
Business device, air conditioner or the network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described above in conjunction with figure, but the invention is not limited to above-mentioned specific realities
Mode is applied, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art exist
Under enlightenment of the invention, without breaking away from the scope protected by the purposes and claims of the present invention, many shapes can be also made
Formula, all of these belong to the protection of the present invention.
Claims (29)
1. a kind of liquid level emasuring device, which is characterized in that the liquid level emasuring device include level probe, liquid level detection circuit,
Master controller；
The level probe is placed in container, the top of the level probe, the container shell respectively with the liquid level
Detection circuit connection；
The master controller is connect with the liquid level detection circuit, the electricity ginseng for being exported according to the liquid level detection circuit
Number, determines the liquid level in the container.
2. liquid level emasuring device according to claim 1, which is characterized in that
The liquid level detection circuit, for exporting corresponding electrical parameter when the liquid level is in different height；Wherein, in institute
When stating liquid level and being in different height, the contact area between the level probe and liquid in the container is different, further leads
Cause the electrical parameter different.
3. liquid level emasuring device according to claim 2, which is characterized in that
When the electrical parameter is voltage, the contact area is bigger, then contact impedance is smaller, further results in the electricity of output
It presses smaller.
4. liquid level emasuring device according to claim 2 or 3, which is characterized in that
The contact area is greater than preset threshold.
5. liquid level emasuring device according to claim 1, which is characterized in that
The master controller determines the liquid in the container for the preset relation according to the electrical parameter and the liquid level
Position.
6. liquid level emasuring device according to claim 5, which is characterized in that
The preset relation are as follows: when the electrical parameter is consistent with driving electrical parameter, determine that the liquid level is pre- lower than first
If liquid level；
When the electrical parameter and the driving electrical parameter are inconsistent, with the between the electrical parameter and the liquid level
One preset relation；Wherein, first preset relation includes at least one of: linear relationship, inversely prroportional relationship；The driving
Electrical parameter is that the master controller is exported to the liquid level detection circuit, to drive the electricity of the liquid level detection circuit work
Parameter.
7. liquid level emasuring device according to claim 1, which is characterized in that the container further include: heating device,
The master controller is connect with the heating device, is also used to after the heating instructions of the container reception to user, really
Whether the fixed liquid level is greater than or equal to the first default liquid level, if it is, controlling the heating device work.
8. liquid level emasuring device according to claim 1, which is characterized in that the container further include: warning device,
The master controller is connect with the warning device, for controlling when determining the liquid level less than the first default liquid level
The warning device alarm.
9. liquid level emasuring device according to claim 1, which is characterized in that the container further include:
Display panel is connect with the master controller, for showing the liquid level in the container；
The master controller is also used to when determining the liquid level less than the first default liquid level, is controlled the display panel and is shown
Prompt information, wherein the prompt information is for prompting user to add water to the container.
10. liquid level emasuring device described in any one of -9 according to claim 1, which is characterized in that
The container is insulating pot, and the shell of the container is conductor.
11. liquid level emasuring device described in any one of -9 according to claim 1, which is characterized in that
The top of the level probe and the top of the container maintain an equal level, the bottom of the bottom of the level probe and the container
Distance be more than the first pre-determined distance, and the level probe is conductor.
12. liquid level emasuring device described in any one of -9 according to claim 1, which is characterized in that
The level probe is following at least one: taper level probe, cylindrical level probe.
13. a kind of liquid level detection circuit, which is characterized in that the liquid level detection circuit is applied to any one of power 1 to power 12
In the liquid level emasuring device,
There is the liquid level detection circuit inserting terminal CN1, the inserting terminal CN1 to have multiple interfaces；Level probe
The shell of container is connected from the different interfaces of the inserting terminal CN1 respectively where top, the liquid level emasuring device；So that
The level probe by liquid in the container, constitute and close together with the liquid level detection circuit, the container casing
Close circuit；
The output end of the liquid level detection circuit is connect with master controller, is in different height for liquid level in the container
When export corresponding electrical parameter to the master controller.
14. liquid level detection circuit according to claim 13, which is characterized in that
When the liquid level is in different height, the contact area between the level probe and the liquid is different, described to connect
Contacting surface product is bigger, then contact impedance is smaller, and it is smaller to further result in the electrical parameter.
15. liquid level detection circuit according to claim 14, which is characterized in that
The input terminal of the liquid level detection circuit is connect with the master controller, for receiving the driving of the master controller input
Electrical parameter.
16. liquid level detection circuit according to claim 15, which is characterized in that
The drive waveforms of the driving electrical parameter be triangular wave waveform with specific frequency F and amplitude and specific, square-wave waveform,
At least one of sine and cosine waveform.
17. liquid level detection circuit according to claim 15, which is characterized in that
The liquid level detection circuit includes first resistor R1, first capacitor C1, the second capacitor C2, the electricity of third capacitor C3 and second
Hinder R5, wherein the R1, the C1, the C3, the R5 are connected in series, and the C1, the C2 and the C3 parallel connection connect
It connects；The C1 is for obstructing direct current signal；The C2, the C3 are used to filter；The R5 is used for current limliting；
The liquid level detection circuit further includes ground terminal, is connect with the intersection point that converges of the C1, the C2, the C3.
18. liquid level detection circuit according to claim 17, which is characterized in that
When the electrical parameter of the output, the driving electrical parameter are voltage, the electrical parameter can be by following
Formula determines:
Utemp=Uvcc*R/ (R+R1)；
Wherein, Utemp is the electrical parameter of output, Uvcc is driving electrical parameter, and R is contact impedance；
In direct current liquid level detection circuit, R is purely resistive impedance, i.e., impedance when probe and liquid contact；
In AC liquid level detection circuit, it further includes the capacitive reactance R of capacitor C between probe is contacted with liquid that R, which is non-purely resistive impedance,C
The capacitive reactance R of capacitor C1 in=1/ (2 π f C) and circuitC1=1/ (2 π f C1), wherein π ≈ 3.14, f are the frequency of Uvcc driving voltage
Rate, C, C1 are capacitor's capacity.
19. a kind of level measuring method, which is characterized in that the method is applied to liquid described in any one of power 1 to power 12
In level measuring arrangement, which comprises
Obtain the electrical parameter of liquid level detection circuit output；
The liquid level in container is determined according to the electrical parameter；Wherein, level probe is placed in the container, the liquid level is visited
The top of needle, the container shell connect respectively with the liquid level detection circuit.
20. according to the method for claim 19, which is characterized in that
The electrical parameter has different values when the liquid level is in different height.
21. according to the method for claim 19, which is characterized in that
The electrical parameter is voltage.
22. according to the method for claim 19, which is characterized in that determine the liquid level packet in container according to the electrical parameter
It includes:
According to the preset relation of the electrical parameter and the liquid level, the liquid level in the container is determined.
23. according to the method for claim 22, which is characterized in that
The preset relation are as follows: when the electrical parameter is consistent with driving electrical parameter, determine that the liquid level is pre- lower than first
If liquid level；
When the electrical parameter and the driving electrical parameter are inconsistent, with the between the electrical parameter and the liquid level
One preset relation；Wherein, first preset relation includes at least one of: linear relationship, inversely prroportional relationship；
The driving electrical parameter is the electrical parameter to drive the liquid level detection circuit work.
24. according to the method for claim 19, which is characterized in that the method also includes:
Receive the heating instructions of user；
Determine whether the liquid level is greater than or equal to the first default liquid level, if it is, triggering the heating operation of the container.
25. according to the method for claim 19, which is characterized in that determining the liquid level in container according to the electrical parameter
Later, the method also includes:
When determining the liquid level less than the first default liquid level, the alarm operation of the container is triggered.
26. according to the method for claim 19, which is characterized in that determining the liquid level in container according to the electrical parameter
Later, the method also includes:
Trigger the display operation of the container；
When determining the liquid level less than the first default liquid level, the container display reminding information is triggered, wherein the prompt letter
Breath is for prompting user to add water to the container.
27. a kind of equipment, which is characterized in that the equipment includes weighing 1 to liquid level emasuring device described in power any one of 12,
The equipment is air conditioner.
28. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor is realized when executing described program such as any one of claim 19 to 26 institute
The level measuring method stated.
29. a kind of storage medium comprising computer executable instructions, the computer executable instructions are by computer disposal
For executing the level measuring method as described in any one of claim 19 to 26 when device executes.
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| CN201811162318.4A CN109506737A (en) | 2018-09-30 | 2018-09-30 | A kind of level measuring method, device and equipment, liquid level detection circuit |
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| CN201811162318.4A CN109506737A (en) | 2018-09-30 | 2018-09-30 | A kind of level measuring method, device and equipment, liquid level detection circuit |
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