CN108981848A - Level display device and its application with analog-digital conversion function - Google Patents
Level display device and its application with analog-digital conversion function Download PDFInfo
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- CN108981848A CN108981848A CN201810989224.8A CN201810989224A CN108981848A CN 108981848 A CN108981848 A CN 108981848A CN 201810989224 A CN201810989224 A CN 201810989224A CN 108981848 A CN108981848 A CN 108981848A
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- signal
- liquid level
- comparison circuit
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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
- G01F23/80—Arrangements for signal processing
- G01F23/806—Particular electronic circuits for handling non-digital processing equipment
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a kind of level display device with analog-digital conversion function and its applications, overcome existing level display device at high cost, develop complicated problem.The device includes that packet receiving includes collection of simulant signal interface, signal voltage comparison circuit and liquid level indicator light.Collection of simulant signal interface is powered for device and signal acquisition, and signal voltage comparison circuit is used to analyze and determine acquisition signal.Liquid level indicator light is located on level display device panel, for showing liquid level.The configuration of the present invention is simple, cost is relatively low, and solves the problems, such as that common simulation amount tank gage needs secondary development, liquid level can be directly carried out according to analog quantity output signals and shown.
Description
Technical field
The present invention relates to a kind of level display device with analog-digital conversion function and its application, it is particularly suitable for mould
The EMU water supply hygiene system of analog quantity liquid level sensor.
Background technique
With the continuous development of China express railway technology, the speed of train and service are all being continuously improved.Not only save
Hourage, the tour condition is also set to have obtained greatly improving, the reduction of cost of trip, along with society relies life to people
The enhancing for the earth environmental consciousness deposited, so that requirement of the high-speed railway to water supply hygiene system is higher and higher.In order to meet motor-car
The work requirements of group staff the stages such as are reorganized and outfit, safeguards in train and need to train health department water tank, dirt box liquid level need
It monitors in real time.
However, water tank, dirt box liquid level sensor signal transfer mode are that analog quantity is defeated in the existing vehicle in current part
Out, and the level display device of part EMU needs the input signal of digital quantity.I.e. the output of liquid level sensor and liquid level are aobvious
Show that the input signal of plate mismatches, can not directly use, be based on this, an analog signal is needed to be converted into the dress of digital signal
Set, but this greatly be all based on CPU to the acquisition of analog signal after, write by internal processes, export for digital quantity signal to show
It is shown on showing device.The display mode increases the cost of display device by the way that CPU is added, and needs the secondary of program
It writes, develop, can achieve the purpose that demand.
The present invention is a kind of level display device with analog-digital conversion function, without increasing the two of CPU and programming
Secondary exploitation, it will be able to realize the conversion of analog quantity and digital quantity.
Summary of the invention
The present invention to solve the above-mentioned problems, proposes a kind of level display device with analog-digital conversion function and its answers
With cost is relatively low by the present invention, and does not need secondary development.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of level display device with analog-digital conversion function, including collection of simulant signal interface, signal voltage compare
Circuit and liquid level indicator light, in which:
The collection of simulant signal interface includes power interface and liquid level sensor analog interface, and the power interface connects
Enter extraneous power supply, the analog interface accesses liquid level sensor, receives the measuring signal of liquid level sensor；
The signal voltage comparison circuit, including multichannel comparison circuit, every road comparison circuit include concatenated gain not
The reference voltage of adjustable operational amplifier circuit and output triode, each road operational amplifier circuit is different, when the measuring signal of acquisition is higher than certain
All the way when the reference voltage of comparison circuit, the signal output end of the comparison circuit exports high level signal, other comparison circuits
Non-output signal；
The liquid level indicator light is corresponding in turn to the light emitting diode being connected serially in each road comparison circuit including multiple, described
Light emitting diode is acted according to the signal of the signal output end of each comparison circuit, realizes liquid level instruction.
Further, the level display device accesses extraneous power supply by power interface, and connects liquid level sensor, protects
Card level display device and liquid level sensor are in same voltage class.
Further, the signal voltage comparison circuit, when the measurement voltage signal of acquisition is less than certain comparison circuit all the way
Reference voltage when, the output triode cut-off of the comparison circuit is equivalent to output end open circuit, signal output end no signal is defeated
Out.
When collection voltages signal is greater than certain reference voltage of comparison circuit all the way, circuit output triode saturation, phase
When terminating low potential in output, signal output end exports high level signal.
Further, the signal of each road comparison circuit of the light emitting diode cathode connection signal voltage comparator circuit is defeated
Outlet, anode connection power supply high level common end.
Further, when signal voltage comparison circuit signal output end exports low level, LEDs ON, liquid level
Indicator light lights, and when signal voltage comparison circuit signal exports high level, light emitting diode cut-off, liquid level indicator light extinguishes,
To have the function that liquid level indicates.
Further, the operational amplifier circuit includes operational amplifier and resistance, the non-inverting input terminal of the operational amplifier
Apply fixed voltage as the reference voltage, reverse input end inputs the analog signal voltage of liquid level sensor, the resistance connection
Between the output end and feeder ear of operational amplifier.
Further, divider resistance, the partial pressure of each comparison circuit are in series with per the non-inverting input terminal of comparison circuit all the way
Resistance series connection, forms bleeder circuit, supply voltage is divided into and represents multiple reference voltage signals for representing different liquid level shelves.
Further, the reference voltage of the comparison circuit is sequentially increased.
A kind of water supply hygiene system, is provided with above-mentioned level display device.
A kind of motor-car is provided with above-mentioned water supply hygiene system or level display device.
Compared with prior art, the invention has the benefit that
1, the signal analysis of analog-to-digital conversion level display device is realized by voltage comparator circuit, which is built into
This is low with preferable economic benefit.
2, traditional analog amount level display device is compared, which does not need artificial secondary development, greatly reduce production
Cost shortens the production cycle.
3, different liquid level display modes can be coped with by changing the combination of the quantity and divider resistance of voltage comparator circuit
Requirement.
4, it is aobvious to be able to achieve the liquid level with analog quantity liquid level sensor EMU water supply hygiene system cabinet completely by the present invention
Show function.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is outside drawing of the invention；
Fig. 2 is voltage comparator circuit schematic diagram of the invention；
Fig. 3 is whole interior schematic diagram of the present invention；
Specific embodiment:
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
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 application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this hair
Bright each component or component structure relationship and the relative of determination, not refer in particular to either component or element in the present invention, cannot understand
For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and indicate may be a fixed connection,
It is also possible to be integrally connected or is detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the present invention as the case may be,
It is not considered as limiting the invention.
A kind of water supply hygiene system liquid level display device with analog-digital conversion function, which includes collection of simulant signal
Interface, signal voltage comparison circuit and liquid level indicator light three parts composition.
Signal acquisition interface is divided into power interface and liquid level sensor analog interface.Analog-to-digital conversion level display device is logical
It crosses power interface to access extraneous power supply and power to liquid level sensor, guarantees analog-to-digital conversion level display device and liquid level sensor
In same voltage class.Analog-to-digital conversion level display device accesses liquid level sensor by analog interface and transmits signal, leads to
The analysis to signal is crossed to be indicated to the real-time level of water sanitary system.
Signal voltage comparison circuit is the core of analog-to-digital conversion level display device, which adopts for comparison signal
Collect interface voltage signal collected, by the nonadjustable operational amplifier circuit of gain as signal output end.When collection voltages signal
Less than certain all the way the reference voltage of comparison circuit when, the circuit output triode cut-off, be equivalent to output end open circuit, signal output
Hold no signal output.When collection voltages signal is greater than certain reference voltage of comparison circuit all the way, the circuit output triode is full
With, it is equivalent to and exports termination low potential, signal output end output high level signal.
Liquid level indicator light is the display portion of analog-to-digital conversion level display device, is executed by light emitting diode.Luminous two
The signal output end of pole pipe cathode connection signal voltage comparator circuit, anode connection power supply high level common end.Work as signal voltage
When comparison circuit signal output end exports low level, LEDs ON liquid level indicator light is lighted, when signal voltage is more electric
When road signal exports high level, light emitting diode shut-off level indicator light extinguishes, to have the function that liquid level indicates.
Specifically, input power interface 1 is connected with extraneous power supply as Fig. 1 shows, provided to analog-to-digital conversion level display device
0-36V or ± 1- ± 18V DC power supply.Out-put supply interface 2 is corresponding with input power interface 1, is external liquid level sensor
Power supply.In analog signals incoming analog signal acquisition interface 3, analog signals are analyzed and determined by internal circuit
Afterwards, liquid level is carried out by liquid level signal indicator light 4-8 to show.
From Figure 2 it can be seen that voltage comparator circuit is similar to the nonadjustable operational amplifier of gain.There are two defeated for each comparator
Enter end and an output end.Two input terminal one is known as non-inverting input terminal, is indicated with "+", another is known as inverting input terminal,
It is indicated with "-".With make comparisons two voltage when, non-inverting input terminal adds a fixed voltage Ur to make reference voltage, reverse input end
Liquid feeding level sensor analog signal voltage Uin.As Ur < Uin, efferent duct cut-off is equivalent to output end open circuit, and output at this time is
High level UOH.As Ur > Uin, efferent duct saturation is equivalent to output termination low potential, and output at this time is low level UOL.Two
Input terminal voltage difference is greater than 10mV and ensures that output can reliably be transformed into another state from a kind of state.
The signal that the voltage comparator circuit constitutes analog-to-digital conversion level display device analyzes and determines module.In Fig. 3
The inverting input terminal of visible voltage comparator circuit accesses liquid level sensor analog voltage signal UIN, UIN in whole interior schematic diagram
It is in same voltage class with analog-to-digital conversion level display device power supply, as liquid level changes from 0%-100%, UIN is from-Vcc
To+Vcc consecutive variations.The non-inverting input terminal of voltage comparator circuit accesses different reference voltages, which is by four
Supply voltage is divided by the bleeder circuit of 4.7K Ω divider resistance composition represents 20%, 50%, 75%, 100% 4 liquid level
Reference voltage signal.The output of voltage comparator circuit is connected to liquid level indicator light cathode, and anode is connected to power supply+Vcc.
As seen from Figure 3, the reference voltage of non-inverting input terminal is (+Vcc--Vcc)/4 in 25% liquid level comparison circuit.Work as liquid
When position is increased to 25% or more, the output voltage of liquid level sensor is higher than (+Vcc--Vcc)/4, at this time 25% liquid level comparison circuit
Inverting input terminal voltage is higher than non-inverting input terminal voltage, and efferent duct saturation exports low level-Vcc, 25% liquid level indicator light LED4
Conducting lights, and completes 25% liquid level and indicates function.According to identical principle, remaining liquid level refers to during liquid level constantly rises
Show that lamp also can be lighted successively.
Certainly, in other embodiments, the quantity of liquid level comparison circuit can be increased or decreased, correspondingly, the ratio of liquid level
The distribution of example shelves and reference voltage is also adapted with quantity.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of level display device with analog-digital conversion function, it is characterized in that: including collection of simulant signal interface, signal electricity
Press comparison circuit and liquid level indicator light, in which:
The collection of simulant signal interface includes power interface and liquid level sensor analog interface, and the power interface access is outer
Boundary's power supply, the analog interface access liquid level sensor, receive the measuring signal of liquid level sensor；
The signal voltage comparison circuit, including multichannel comparison circuit, every road comparison circuit include that concatenated gain is non-adjustable
Operational amplifier circuit and output triode, the reference voltage of each road operational amplifier circuit is different, when the measuring signal of acquisition is higher than certain all the way
When the reference voltage of comparison circuit, the signal output end of the comparison circuit exports high level signal, other comparison circuits without defeated
Signal out；
The liquid level indicator light is corresponding in turn to the light emitting diode being connected serially in each road comparison circuit including multiple, described to shine
Diode is acted according to the signal of the signal output end of each comparison circuit, realizes liquid level instruction.
2. a kind of level display device with analog-digital conversion function as described in claim 1, it is characterized in that: the liquid level is aobvious
Showing device accesses extraneous power supply by power interface, and connects liquid level sensor, guarantees level display device and liquid level sensor
In same voltage class.
3. a kind of level display device with analog-digital conversion function as described in claim 1, it is characterized in that: the signal is electric
Press comparison circuit, when the measurement voltage signal of acquisition be less than certain reference voltage of comparison circuit all the way when, the comparison circuit it is defeated
Triode ends out, is equivalent to output end open circuit, the output of signal output end no signal.
4. a kind of level display device with analog-digital conversion function as described in claim 1, it is characterized in that: working as collection voltages
Signal be greater than certain all the way the reference voltage of comparison circuit when, the circuit output triode saturation, be equivalent to output termination low potential,
Signal output end exports high level signal.
5. a kind of level display device with analog-digital conversion function as described in claim 1, it is characterized in that: described luminous two
The signal output end of each road comparison circuit of pole pipe cathode connection signal voltage comparator circuit, anode connection power supply high level are public
End.
6. a kind of level display device with analog-digital conversion function as claimed in claim 5, it is characterized in that: working as signal voltage
When comparison circuit signal output end exports low level, LEDs ON, liquid level indicator light is lighted, when signal voltage is more electric
When road signal exports high level, light emitting diode cut-off, liquid level indicator light extinguishes, to have the function that liquid level indicates.
7. a kind of level display device with analog-digital conversion function as described in claim 1, it is characterized in that: the amplifier is electric
Road includes operational amplifier and resistance, and the non-inverting input terminal of the operational amplifier applies fixed voltage as the reference voltage, instead
To the analog signal voltage of input terminal input liquid level sensor, the resistance is connected to the output end and feeder ear of operational amplifier
Between.
8. a kind of level display device with analog-digital conversion function as described in claim 1, it is characterized in that: per comparing all the way
The non-inverting input terminal of circuit is in series with divider resistance, and the divider resistance series connection of each comparison circuit forms bleeder circuit, by power supply
Voltage, which is divided into, represents multiple reference voltage signals for representing different liquid level shelves；
Further, the reference voltage of the comparison circuit is sequentially increased.
9. a kind of water supply hygiene system fills it is characterized in that: setting is shown just like liquid level of any of claims 1-8
It sets.
10. a kind of motor-car, it is characterized in that: being provided with water supply hygiene system as claimed in claim 9 or as in claim 1-8
Described in any item level display devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810989224.8A CN108981848A (en) | 2018-08-28 | 2018-08-28 | Level display device and its application with analog-digital conversion function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810989224.8A CN108981848A (en) | 2018-08-28 | 2018-08-28 | Level display device and its application with analog-digital conversion function |
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| Publication Number | Publication Date |
|---|---|
| CN108981848A true CN108981848A (en) | 2018-12-11 |
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ID=64547288
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810989224.8A Pending CN108981848A (en) | 2018-08-28 | 2018-08-28 | Level display device and its application with analog-digital conversion function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715703A (en) * | 2019-10-22 | 2020-01-21 | 山东中车华腾环保科技有限公司 | Digital-to-analog conversion control device and method for liquid level display of train water tank |
| CN114311825A (en) * | 2021-11-19 | 2022-04-12 | 科达制造股份有限公司 | Method, device and system for dynamically displaying working tonnage of hydraulic press |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201035557Y (en) * | 2007-01-24 | 2008-03-12 | 国营千山电子仪器厂 | Switch capacity signal interface circuit |
| CN201548852U (en) * | 2009-11-11 | 2010-08-11 | 中国第一汽车集团公司 | Interface signal matching device of level transmitter module |
| CN201795841U (en) * | 2010-02-09 | 2011-04-13 | 汪宝平 | Liquid level detector |
| CN204679874U (en) * | 2015-05-30 | 2015-09-30 | 西安科技大学 | A kind of heating boiler level sensing display control circuit |
| CN107727190A (en) * | 2017-10-12 | 2018-02-23 | 山东省海洋预报减灾中心 | A kind of storm tide guards against tidal level electronic mark post |
-
2018
- 2018-08-28 CN CN201810989224.8A patent/CN108981848A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201035557Y (en) * | 2007-01-24 | 2008-03-12 | 国营千山电子仪器厂 | Switch capacity signal interface circuit |
| CN201548852U (en) * | 2009-11-11 | 2010-08-11 | 中国第一汽车集团公司 | Interface signal matching device of level transmitter module |
| CN201795841U (en) * | 2010-02-09 | 2011-04-13 | 汪宝平 | Liquid level detector |
| CN204679874U (en) * | 2015-05-30 | 2015-09-30 | 西安科技大学 | A kind of heating boiler level sensing display control circuit |
| CN107727190A (en) * | 2017-10-12 | 2018-02-23 | 山东省海洋预报减灾中心 | A kind of storm tide guards against tidal level electronic mark post |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715703A (en) * | 2019-10-22 | 2020-01-21 | 山东中车华腾环保科技有限公司 | Digital-to-analog conversion control device and method for liquid level display of train water tank |
| CN114311825A (en) * | 2021-11-19 | 2022-04-12 | 科达制造股份有限公司 | Method, device and system for dynamically displaying working tonnage of hydraulic press |
| CN114311825B (en) * | 2021-11-19 | 2024-07-02 | 科达制造股份有限公司 | Hydraulic press working tonnage dynamic display method, device and system |
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