CN209372194U - A kind of general type liquid level detection device - Google Patents
A kind of general type liquid level detection device Download PDFInfo
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- CN209372194U CN209372194U CN201920059550.9U CN201920059550U CN209372194U CN 209372194 U CN209372194 U CN 209372194U CN 201920059550 U CN201920059550 U CN 201920059550U CN 209372194 U CN209372194 U CN 209372194U
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- liquid level
- flute profile
- detection device
- optocoupler
- chip microcontroller
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Abstract
The utility model relates to a kind of general type liquid level detection devices, using flute profile photoelectrical coupler (abbreviation flute profile optocoupler) as level sensing element, in conjunction with conversion circuit, liquid level is converted into electric signal driving diode displaying, and sends host computer to through single-chip microcontroller acquisition, communication to show or control liquid level.The utility model carries out segmentation detection, display to the liquid level of liquid in fluid reservoir, and liquid level information is passed to by host computer by microcontroller communication, suitable for transparency, the uncertain various liquid levels of corrosivity detections different under static pressure, structure is simple, it is low in cost, there is wide applicability.
Description
Technical field
The utility model relates to liquid level detection devices, and in particular to a kind of general type liquid level detection device.
Background technique
Currently, the sensor of measurement liquid level is more, classify by its transfer principle, resistance-type can be divided into, microwave type, swashed
Light formula, ultrasonic type, inductance type, condenser type, electromagnetic type, piezoelectric type, nuclear radiation formula etc., some is only used for transparency liquid, has
Be only used for non-corrosive liquid, and the price of general type is too high.
Summary of the invention
The purpose of this utility model is: a kind of general type liquid level detection device is designed, structure is simple, and it is low in cost,
Suitable for transparency, the uncertain various liquid levels of corrosivity segmentation detections different under static pressure, display and water level information
Long Distant Transmit has wide applicability.
The principles of the present invention are: using flute profile photoelectrical coupler (abbreviation flute profile optocoupler) as level sensing element,
In conjunction with conversion circuit, liquid level is converted into electric signal driving diode displaying, and send to through single-chip microcontroller acquisition, communication
Position machine is handled, detection for liquid level under static pressure.
The technical solution of the utility model is: the linker of glass pipe type is installed additional to fluid reservoir, along the height of glass tube
Spend direction, corresponding fluid reservoir is minimum and highest liquid level within the scope of equidistant several flute profile optocouplers of installation, place in glass tube
Length be it is 1.2 times of flute profile optocoupler spacing, opaque, be not afraid of fluid to be measured corrosion, density be about fluid to be measured density 0.5
Times, the cylindrical body buoy that freely up and down moves in a glass tube；Liquid level in glass tube, buoy height and fluid reservoir in liquid level
Synchronous variation, which height buoy, which is moved to, is just blocked the optical path of the photoelectrical coupler of which height, converted circuit, is made pair
The light emitting diode answered lights instruction liquid level；If it is transparency liquid, buoy reaches which height, the light-emitting diodes of which height
Pipe is just lighted, and other light emitting diodes are not lighted；If it is opaque liquid, liquid itself can block optical path, float
Drift can be cancelled, which height is liquid level reach, which height each light emitting diode below is all lighted, the hair more than buoy
Optical diode is not lighted；Since detecting element is not contacted with fluid to be measured, the liquid level of corrosive liquids can detecte；Liquid level is defeated
Signal is acquired by subsequent single-chip microcontroller, is communicated by RS-485 out, and the host computer that liquid level signal is transmitted to a distant place is shown or right
Liquid level is controlled.
The beneficial effects of the utility model are: the 1, linker that is connected to fluid reservoir of setting and opaque, corrosion resistant floating
Drift is detecting element using flute profile optocoupler, is equipped with conversion circuit, being suitble to different transparencies, the uncertain liquid of corrosivity
Level sensing and display, structure is simple, low in cost, has wide applicability；2, height of liquid level can both be shown at the scene,
It can be shown again in strange land or liquid level is controlled.
Detailed description of the invention
Fig. 1 is the utility model liquid level detection device schematic diagram.
Fig. 2 is the utility model circuit diagram.
Specific embodiment
As shown in Figure 1, 2, which includes liquid level detection device and circuit two parts.
The liquid level detection device includes fluid reservoir 10, installs linker on fluid reservoir 10；Linker is by being mounted on storage
Connecting tube 20 that the bottom of flow container 10 is connected to fluid reservoir, the vertical glass tubes 1 connecting with connecting tube 20 and glass tube are fixed
Clamp 30 is constituted；Liquid level in glass tube 1 is with height changes such as liquid levels in fluid reservoir 10；In the outside of glass tube 1 along its height
Spend direction, corresponding fluid reservoir is minimum and highest liquid level within the scope of equidistant several flute profile optocouplers 3 of stickup, make at glass tube 1
In the optical path of flute profile optocoupler 3, i.e., between the infrared light-emitting diode and phototriode of flute profile optocoupler 3；It is placed in glass tube 1
Lighttight buoy 2, the length of buoy 2 are 1.2 times of flute profile optocoupler spacing；In this way when liquid level is 0, buoy is in bottom,
The optical path of all flute profile optical couplings is not blocked by buoy；When liquid level is not 0, blocked regardless of liquid level always has by buoy
One or two flute profile optocoupler of optical path；Buoy 2 be cylindrical shape, in glass tube 1 because by buoyancy and gravity in liquid level
Under move freely, use is lighttight, is not afraid of fluid to be measured corrosion, material system that density is about 0.5 times of fluid to be measured density
At.
The circuit part is with single-chip microcontroller IC30(model STC89C52) it is core, by liquid level signal detection conversion and show
Show that circuit, multi-way switch circuit and communicating circuit three parts are connected and composed according to electrical circuit mode.
Liquid level signal detection conversion and display portion include: flute profile optocoupler LR0-LR9, Schmidt trigger IC10
(ST0-ST9, model 74LS14, two), resistance R10-R19, resistance R20-R29, resistance R30-R39, light-emitting diodes
Pipe LED0-LED9；A termination+5V power supply of resistance R10-R19, the other end are distinguished each infrared in access slot shape optocoupler LR0-LR9
The anode of light emitting diode, the minus earth of each infrared light-emitting diode in flute profile optocoupler LR0-LR9；Flute profile optocoupler LR0-
The collector of each infrared phototriode connects+5V power supply in LR9, and emitter connects the input of Schmidt trigger ST0-ST9 respectively
End, the input terminal of Schmidt trigger ST0-ST9 while respectively connecting resistance R20-R29 to ground, Schmidt trigger ST0-
ST9 output end difference series limiting resistor R30-R39 after respectively sending and receiving optical diode LED0-LED9 anode, shine two
The minus earth of pole pipe LED0-LED9；The display of LED0-LED9 liquid level on site.
The structure and principle of the conversion circuit of each flute profile optocoupler be it is identical, now with the conversion of the 8th flute profile optocoupler
For circuit, principle is: after power supply is connected, electric current flows through the infrared of flute profile optocoupler LR8 through current-limiting resistance R18 by+5V power supply
Light emitting diode to ground, infrared light-emitting diode light it is luminous, if the optical path of flute profile optocoupler LR8 is not blocked, infrared light
It is irradiated on its phototriode, the input terminal of phototriode conducting, Schmidt trigger ST8 is high level, through ST8 reverse phase
It is afterwards low level, Light-emitting diode LED 8 is not lighted；Conversely, when the optical path of flute profile optocoupler LR8 is blocked by buoy, then infrared light
It cannot be irradiated on its phototriode, the input terminal of phototriode cut-off, Schmidt trigger ST8 is low level, through ST8
It is high level after reverse phase, Light-emitting diode LED 8 is lighted；Liquid level is same in liquid level, the height of buoy 2 and fluid reservoir 10 in glass tube 1
Step variation, which height buoy 2, which is moved to, is just blocked the optical path of the flute profile optocoupler 2 of which height, which corresponding hair of height
Optical diode is just lighted；The position of 2nd flute profile optocoupler LR2 is in for transparency liquid, such as liquid level, then flute profile optocoupler LR2
Optical path is blocked, then the 2nd Light-emitting diode LED 2 is just lighted；If liquid level be in the 2nd and the 3rd flute profile optocoupler LR2 with
Position between LR3, then the optical path of flute profile optocoupler LR2, LR3 are blocked (because buoy length is the 1.2 of flute profile optocoupler spacing simultaneously
Times), then the 2nd and the 3rd Light-emitting diode LED 2 and LED3 are lighted simultaneously；Do not blocked by buoy the flute profile optocoupler of optical path with
Light emitting diode upper and below is not lighted；For opaque liquid, liquid itself can block optical path, and buoy is desirable
Disappear, the corresponding light emitting diode of the following flute profile optocoupler of liquid level is all lighted, and the light emitting diode more than liquid level is not lighted；
When liquid level is 0 i.e. slack tank, buoy is in bottom, and the optical path of all flute profile optical couplings is not blocked by buoy, and all shines
Diode is not lighted.
The multi-way switch circuit: a variable connector IC20(model 74HC4067 is selected for 16), switch input
End I0-I9 connects the output end of Schmidt trigger ST0-ST9 respectively, and common end COM connects the I/O pin of single-chip microcontroller IC30
Selection control terminal S0-S3(of P1.0, variable connector IC20 are used to select different accesses) I/O of single-chip microcontroller IC30 is met respectively
Pin P2.0-P2.3 is controlled by single-chip microcontroller IC30 and is switched, no matter which has been gated, which signal is switched on monolithic
The P1.0 pin of machine IC30；Single-chip microcontroller IC30 selects variable connector IC20 by the level conversion of pin P2.0-P2.3
It is logical, it is come out successively being acquired per level state (i.e. water level situation) all the way by its P1.0 pin.
The communicating circuit: for RS-485 communication interface chip IC40(model MAX485), RXD and TXD pin pair
It should connect RXD the and TXD pin of single-chip microcontroller IC30, control pin/RE is connected with DE and connects the P3.5 pin of single-chip microcontroller IC30, and 8
Foot connects+5V power supply, 5 feet ground connection, and 6,7 feet connect twisted pair, are connected with host computer；Single-chip microcontroller IC30 passes through RS-485 communication interface core
On the one hand piece IC40 receives the instruction of host computer, another party's brow-up position machine sends liquid level information.
The utility model is for transparency liquid, and using lighttight buoy, the resolution series of liquid level is flute profile optocoupler or hair
2 times of optical diode quantity；For opaque liquid, buoy can be omitted, the resolution series of liquid level is equal to flute profile optocoupler or shines
The quantity of diode；It is provided with 10 flute profile optocouplers and light emitting diode in the present embodiment, can also increase and decrease as needed, quantity is got over
The resolution of multi-level is finer, otherwise differentiates more rough.
In the present embodiment, the outer diameter of glass tube 1 is 10mm, internal diameter 8mm；2 length of buoy is between 1.2 times of flute profile optocouplers
Away from diameter 7mm, density is about 0.5 times of fluid to be measured density, corrosion-resistant, transparent materials；Flute profile optocoupler LR0-LR9 is
Commercially available optocoupler, groove width 12mm.
Claims (6)
1. a kind of general type liquid level detection device, including liquid level detection device and circuit two parts；The liquid level detection device
Including fluid reservoir (10), fluid reservoir installs linker on (10)；Linker is by being mounted on bottom and the fluid reservoir of fluid reservoir (10)
The connecting tube (20) of connection, the vertical glass tubes (1) connecting with connecting tube (20) and glass tube fixation clamp (30) are constituted；
Liquid level in glass tube (1) is with height changes such as liquid levels in fluid reservoir (10)；In the outside of glass tube (1) along its height side
To, corresponding fluid reservoir is minimum and highest liquid level within the scope of equidistant several flute profile optocouplers (3) of stickup, make at glass tube (1)
In the optical path of flute profile optocoupler (3), i.e., between the infrared light-emitting diode and phototriode of flute profile optocoupler (3)；Glass tube (1)
It is middle to place lighttight buoy (2), because freely up and down being moved by buoyancy and gravity with liquid level in glass tube (1)；Work as liquid in this way
When position is 0, buoy is in bottom, and the optical path of all flute profile optical couplings is not blocked by buoy；When liquid level is not 0, regardless of liquid
How position height always has one or two flute profile optocoupler that optical path is blocked by buoy；It is characterized in that: the circuit part is with monolithic
Machine IC30 STC89C52 is core, by liquid level signal detection conversion and display circuit, multi-way switch circuit and communicating circuit three
Divide and is connected and composed according to electrical circuit mode.
2. a kind of general type liquid level detection device according to claim 1, it is characterized in that the liquid level signal detection turns
Changing with display portion includes: flute profile optocoupler LR0-LR9, Schmidt trigger IC10 ST0-ST9, model 74LS14, and two
Only, resistance R10-R19, resistance R20-R29, resistance R30-R39,0-LED9 of Light-emitting diode LED；Resistance R10-R19's
One termination+5V power supply, the other end distinguish the anode of each infrared light-emitting diode in access slot shape optocoupler LR0-LR9, flute profile optocoupler
The minus earth of each infrared light-emitting diode in LR0-LR9；The current collection of each infrared phototriode in flute profile optocoupler LR0-LR9
Pole connects+5V power supply, and emitter connects the input terminal of Schmidt trigger ST0-ST9 respectively, and Schmidt trigger ST0-ST9's is defeated
Enter end while extremely, the output end of Schmidt trigger ST0-ST9 distinguishes series limiting resistor to connecting resistance R20-R29 respectively
The anode of sending and receiving optical diode LED0-LED9, the minus earth of 0-LED9 of Light-emitting diode LED are distinguished after R30-R39；
The display of LED0-LED9 liquid level on site.
3. a kind of general type liquid level detection device according to claim 1, it is characterized in that the multi-way switch circuit: for
16 select variable connector IC20 a model 74HC4067, switch input terminal I0-I9 to meet Schmidt trigger ST0-respectively
The output end of ST9, common end COM meet the selection control terminal S0-of I/O the pin P1.0, variable connector IC20 of single-chip microcontroller IC30
I/O pin P2.0-P2.3 that S3 is used to that different accesses to be selected to meet single-chip microcontroller IC30 respectively is cut by single-chip microcontroller IC30 control
It changes, no matter which has been gated, which signal is switched on the P1.0 pin of single-chip microcontroller IC30；Single-chip microcontroller IC30 is by drawing
The level conversion of foot P2.0-P2.3 gates variable connector IC20, every level state, that is, water level situation all the way by it
P1.0 pin is successively acquired and is come out.
4. a kind of general type liquid level detection device according to claim 1, it is characterized in that the communicating circuit: for RS-
The corresponding RXD and TXD pin for meeting single-chip microcontroller IC30 of 485 communication interface chip IC40 model MAX485, RXD and TXD pins,
Control pin/RE is connected with DE and connects the P3.5 pin of single-chip microcontroller IC30, and 8 feet connect+5V power supply, 5 feet ground connection, and 6,7 feet connect multiple twin
Line is connected with host computer；On the one hand single-chip microcontroller IC30 receives the instruction of host computer by RS-485 communication interface chip IC40, separately
On the one hand liquid level information is sent to host computer.
5. a kind of general type liquid level detection device according to claim 1, it is characterized in that buoy (2) is in cylindrical body, length
Degree be 1.2 times of flute profile optocoupler spacing, diameter 7mm, by it is opaque, be not afraid of fluid to be measured corrosion, density be about test solution
The material that 0.5 times of volume density is made.
6. a kind of general type liquid level detection device according to claim 1, it is characterized in that: the outer diameter of glass tube (1) is
10mm, internal diameter 8mm；Flute profile optocoupler LR0-LR9 is commercially available optocoupler, groove width 12mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920059550.9U CN209372194U (en) | 2019-01-15 | 2019-01-15 | A kind of general type liquid level detection device |
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| CN201920059550.9U CN209372194U (en) | 2019-01-15 | 2019-01-15 | A kind of general type liquid level detection device |
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| CN209372194U true CN209372194U (en) | 2019-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556684A (en) * | 2019-01-15 | 2019-04-02 | 淮安信息职业技术学院 | General type level sensing and remote transmitting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556684A (en) * | 2019-01-15 | 2019-04-02 | 淮安信息职业技术学院 | General type level sensing and remote transmitting system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190910 Termination date: 20220115 |