CN110646475A

CN110646475A - Liquid detection device

Info

Publication number: CN110646475A
Application number: CN201810677737.5A
Authority: CN
Inventors: 冯郁波; 李艳飞
Original assignee: Shenzhen Zhanhua Technology Co Ltd
Current assignee: Shenzhen Zhanhua Technology Co Ltd
Priority date: 2018-06-27
Filing date: 2018-06-27
Publication date: 2020-01-03

Abstract

The invention relates to the technical field of liquid detection, and discloses a liquid detection device which comprises a circuit device, wherein the circuit device comprises a circuit device body, one end of the circuit device body is fixedly connected with a circuit board, one end, close to the circuit board, of the circuit body is inserted into a shell, a prism is arranged in the middle of the shell, one end, close to the circuit board, of the circuit device body is provided with a groove, an optical coupler realization area is arranged in the groove, an optical coupler circuit is arranged in the optical coupler realization area, the optical coupler circuit comprises a photoelectric light emitting tube and a photoelectric receiving tube, and a dielectric constant detection area is arranged in the circuit board and is inserted into the shell. This liquid detection device realizes regional and dielectric constant detection area through setting up the opto-coupler, and the cooperation that opto-coupler and dielectric constant detected can know that the shell is in the air, in the oil, still in aqueous to reach the detection mesh.

Description

Liquid detection device

Technical Field

The invention relates to the technical field of liquid detection, in particular to a liquid detection device.

Background

At present, a known device capable of distinguishing liquids with different characteristics consists of a floater and a plurality of reed pipes. When the device is fixed at the corresponding position, the characteristics of the corresponding liquid are confirmed by utilizing the difference of the buoyancy of the float by different liquids. However, the structure is large, the requirement on the purity of liquid is high, the required liquid amount to be detected is large, and the potential danger of blocking exists under the condition that a moving part exists. The method is most applicable to the condition that the liquid amount to be detected is small (if the double-layer oil tank of the gas station leaks), and the method is easy to cause wrong judgment.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the liquid detection device which has the advantages of small volume, accurate detection, no moving part, only a small amount of liquid to be detected, convenience in popularization and use and the like, and solves the problems that the existing liquid detection device is large in volume, needs a relatively large amount of liquid to be detected, has hidden danger of jamming, is easy to cause wrong judgment and the like.

(II) technical scheme

In order to realize the purposes of small volume, accurate detection, no moving part, only a small amount of liquid to be detected and convenient popularization and use, the invention provides the following technical scheme: the utility model provides a liquid detection device, includes circuit arrangement, circuit arrangement includes the circuit arrangement body, the one end fixedly connected with circuit board of circuit arrangement body, the one end that the circuit body is close to the circuit board is pegged graft in the inside of shell, the middle part of shell is provided with the prism, the one end that the circuit arrangement body is close to the circuit board is seted up flutedly, it realizes regionally to be provided with the opto-coupler in the recess, the inside of circuit board is provided with the dielectric constant and detects regionally, circuit arrangement pegs graft with the shell.

Preferably, an optical coupling circuit is arranged in the optical coupling realization area, and the optical coupling circuit comprises a photoelectric light emitting tube and a photoelectric receiving tube.

Preferably, a dielectric constant detection circuit is arranged in the dielectric constant detection area, and the dielectric constant detection circuit comprises a metal induction disc, a special chip and an external capacitor.

Preferably, the housing is transparent.

Preferably, the prism is disposed right above the optical coupling realization region.

(III) advantageous effects

Compared with the prior art, the invention provides a liquid detection device, which has the following beneficial effects:

1. the liquid detection device is provided with the optical coupler implementation area, when the device is in the air, light emitted by the optical coupler implementation area can be totally reflected at the plane position of the shell, and most of light beams can be emitted back to the optical coupler implementation area; when the device is in liquid, because the refractive index of the liquid is similar to that of the material used by the prism, light emitted by the optical coupler realization area can be emitted out of the device through the plane position of the shell, and only a small amount of light beams are emitted back to the optical coupler realization area; the voltage of the receiving end of the area is realized by measuring the optical coupler, so that the two states can be sensed, and the two states are distinguished to judge whether the product is in the air or the liquid.

2. The liquid detection device can sense the collecting and dispersing capacitance values nearby the liquid detection device by arranging the dielectric constant detection area, and can know the corresponding dielectric constant values nearby the liquid detection device and different substances according to the different dielectric constant values by detecting the change of the collecting and dispersing capacitance values nearby the liquid detection device, and the shell is judged to be in water or air or oil according to the size of the dielectric constant values.

3. This liquid detection device realizes regional and dielectric constant detection area through setting up the opto-coupler, and the cooperation that opto-coupler and dielectric constant detected can know that the shell is in the air, in the oil, still in aqueous to reach the detection mesh.

Drawings

FIG. 1 is a partial perspective view of a liquid detection device according to the present invention;

FIG. 2 is a schematic view of a liquid detection apparatus according to the present invention;

FIG. 3 is a schematic left-view structural diagram of a liquid detection apparatus according to the present invention;

FIG. 4 is a schematic bottom view of a liquid detection apparatus according to the present invention;

FIG. 5 is a schematic top view of a circuit device of the liquid detection apparatus according to the present invention;

FIG. 6 is a schematic circuit diagram of an optical coupling circuit in the liquid detection apparatus according to the present invention;

fig. 7 is a schematic circuit diagram of a dielectric constant detection circuit in a liquid detection device according to the present invention.

In the figure: the circuit device comprises a circuit device 1, a circuit device 101 body, a circuit board 102, a shell 2, a prism 3, a groove 4, an optical coupler realization area 5 and a dielectric constant detection area 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides the following technical solutions: a liquid detection device comprises a circuit device 1, the circuit device 1 comprises a circuit device body 101, one end of the circuit device body 101 is fixedly connected with a circuit board 102, one end of the circuit body 101, close to the circuit board 102, is inserted into a shell 2, the shell 2 is transparent, a prism 3 is arranged in the middle of the shell 2, the prism 3 is arranged right above an optical coupling realization area 5, one end of the circuit device body 101, close to the circuit board 102, is provided with a groove 4, the optical coupling realization area 5 is arranged in the groove 4, an optical coupling circuit is arranged in the optical coupling realization area 5, the optical coupling circuit comprises a photoelectric light emitting tube (D8 in figure 6) and a photoelectric receiving tube (Q1 in figure 6), the optical circuit is adjusted and deflected by matching with the prism 3 on the shell 2, the phenomenon that light can be refracted when being transmitted in an uneven medium is utilized, when a specific area on the outer, when the area is contacted with liquid, such as alcohol, water, oil and the like, because the refractive index of the liquid is similar to that of a transparent shell, most of the light beams can be diffused outwards of the device in a refraction and transmission mode, the light intensity received by the photoelectric receiving tube is weakened, the area 5 is realized by arranging the optical coupler, when the device is in the air, the light emitted by the area 5 is realized by the optical coupler, the light can be totally reflected at the plane position of the shell 2, and most of the light beams can be reflected back to the area 5; when the device is in liquid, because the refractive index of the liquid is similar to that of the material used by the prism 3, light emitted by the optical coupler realization area 5 can be emitted out of the device through the plane position of the shell 2, and only a small amount of light beams are emitted back to the optical coupler realization area 5; the two states can be sensed by measuring the voltage at the receiving end of the optical coupler realization area 5, and the two states can be distinguished to judge whether the product is in the air or in the liquid, the circuit board 102 is internally provided with a dielectric constant detection area 6, the dielectric constant detection area 6 is internally provided with a dielectric constant detection circuit, the dielectric constant detection circuit comprises a metal induction disc (P in figure 7), a special chip (U in figure 7) and an externally-hung capacitor (C in figure 7), the chip mainly comprises an internal oscillation starting circuit and a frequency detection circuit, when the medium changes at the corresponding position of the induction disc, the dielectric constant of the induction disc also changes, the dielectric constant changes, the C value in an R/C oscillation circuit can be changed, the change of the C value can be sensed by the frequency detection circuit, and the collecting and dispersing capacitance values near the dielectric constant detection area 6 can be sensed by the arrangement of the dielectric constant detection area, through detecting the change of its nearby distributed capacitance value, can know the dielectric constant value that its nearby corresponds, different materials, to the dielectric constant value with regard to the difference, through the size of this numerical value, judge that the shell is in aqueous, still in air or oil, realize regional 5 and dielectric constant detection area 6 through setting up the opto-coupler, the cooperation that opto-coupler and dielectric constant detected, can know the shell in the air, in the oil, still in aqueous, in order to reach the detection purpose, circuit arrangement 1 is pegged graft with shell 2.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

When the optical coupler circuit is used, when light returns, the medium of the optical coupler circuit is gas; when the optical coupling circuit does not return light, the medium is liquid; when the dielectric constant detection circuit detects that the dielectric constant value is higher, the medium is a high-dielectric-constant substance such as water; when the dielectric constant detection circuit detects that the dielectric constant value is low, the medium is a low-dielectric-constant substance such as air or oil.

In summary, in the liquid detection device, the optical coupler implementation area 5 is arranged, and when the device is in the air, light emitted by the optical coupler implementation area 5 is totally reflected at the plane position of the shell 2, and most of light beams can be emitted back to the optical coupler implementation area 5; when the device is in liquid, because the refractive index of the liquid is similar to that of the material used by the prism 3, light emitted by the optical coupler realization area 5 can be emitted out of the device through the plane position of the shell 2, and only a small amount of light beams are emitted back to the optical coupler realization area 5; the two states can be sensed by measuring the voltage of the receiving end of the optical coupler realization area 5, and the two states are distinguished to judge whether the product is in the air or the liquid; the dielectric constant detection area 6 is arranged to sense the collecting and dispersing capacitance values nearby the dielectric constant detection area, and the corresponding dielectric constant values nearby the dielectric constant detection area can be known by detecting the change of the collecting and dispersing capacitance values nearby the dielectric constant detection area, and for different substances, the value of the dielectric constant corresponding to the different substances is used for judging whether the shell is in water or air or oil; realize regional 5 and dielectric constant detection area 6 through setting up the opto-coupler, the cooperation that opto-coupler and dielectric constant detected can know that the shell is in the air, in the oil, still in aqueous to reach the detection purpose.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A liquid detection device comprising circuit means (1), characterized in that: the circuit device (1) comprises a circuit device body (101), a circuit board (102) is fixedly connected to one end of the circuit device body (101), one end, close to the circuit board (102), of the circuit body (101) is connected to the inside of the shell (2) in an inserting mode, a prism (3) is arranged in the middle of the shell (2), a groove (4) is formed in one end, close to the circuit board (102), of the circuit device body (101), an optical coupling achieving area (5) is arranged in the groove (4), a dielectric constant detecting area (6) is arranged in the circuit board (102), and the circuit device (1) is connected to the shell (2) in an inserting mode.

2. A liquid detection device as claimed in claim 1, wherein: the inside of opto-coupler realization region (5) is provided with the opto-coupler circuit, the opto-coupler circuit includes photoelectric emission pipe and photoelectric receiving tube.

3. A liquid detection device as claimed in claim 1, wherein: and a dielectric constant detection circuit is arranged in the dielectric constant detection area (6), and comprises a metal induction disc, a special chip and an external capacitor.

4. A liquid detection device as claimed in claim 1, wherein: the shell (2) is transparent.

5. A liquid detection device as claimed in claim 1, wherein: the prism (3) is arranged right above the optical coupling realization area (5).