CN210198501U - An optical two-point liquid level sensor - Google Patents
An optical two-point liquid level sensor Download PDFInfo
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- CN210198501U CN210198501U CN201921545135.0U CN201921545135U CN210198501U CN 210198501 U CN210198501 U CN 210198501U CN 201921545135 U CN201921545135 U CN 201921545135U CN 210198501 U CN210198501 U CN 210198501U
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- 239000007788 liquid Substances 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 230000008054 signal transmission Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 239000002609 medium Substances 0.000 description 6
- 239000012736 aqueous medium Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
An optical double-point liquid level sensor relates to the technical field of liquid level detection. It comprises a sensor body; the fixing component is arranged on the sensor body and used for mounting the sensor body on the water storage tank; the infrared transmitter is arranged in the sensor body and used for transmitting infrared light rays into the water storage tank; the first infrared receiver and the second infrared receiver are arranged in the sensor body and used for receiving infrared light; the first light-transmitting reflecting piece is arranged on one side, close to the infrared emitter and the first infrared receiver, of the sensor body; the second light-transmitting reflecting piece is arranged on one side, close to the infrared emitter and the second infrared receiver, of the sensor body; and the signal transmission line is arranged in the sensor body and connected with the external control module. By adopting the technical scheme, the device has the advantages of simple structure, high sensitivity and accurate detection.
Description
Technical Field
The utility model relates to a liquid level detection technical field, concretely relates to two liquid level sensor of optical type.
Background
In the field of small household appliance application, regardless of RO machines, drinking machines and water dispensers, the floating ball switch is generally adopted to control the water level at present, and the floating ball switch has some defects in application, such as poor actuation caused by easy blocking of a floating ball as a moving part, inconvenient installation, low reliability, low sensitivity and the like.
Two point liquid level sensor of traditional optics formula need use two sets of sensors and dispose two infrared emitter and two infrared receiver, just can be accurate listen two point water level for the structure is complicated, uses inconveniently, consequently needs to improve.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide a two liquid level sensor of optical formula, have simple structure, sensitivity height, listen accurate advantage.
In order to achieve the above object, the utility model adopts the following technical scheme: an optical dual-point liquid level sensor comprising: a sensor body; the fixing component is arranged on the sensor body and used for mounting the sensor body on the water storage tank; the infrared transmitter is arranged in the sensor body and used for transmitting infrared light rays into the water storage tank; the first infrared receiver is arranged in the sensor body and used for receiving infrared light; the second infrared receiver is arranged in the sensor body and used for receiving infrared light; the first light-transmitting reflecting piece is arranged on one side, close to the infrared transmitter and the first infrared receiver, of the sensor body, totally reflects infrared light to the first infrared receiver under an air medium, partially reflects the infrared light to the first infrared receiver under an aqueous medium, and is used for detecting low water level; the second light-transmitting reflecting piece is arranged on one side, close to the infrared transmitter and the second infrared receiver, of the sensor body, totally reflects infrared light to the second infrared receiver under an air medium, partially reflects the infrared light to the second infrared receiver under an aqueous medium and is used for detecting high water level; and the signal transmission line is arranged in the sensor body, one end of the signal transmission line is connected with the infrared transmitter, the first infrared receiver and the second infrared receiver, and one end of the signal transmission line is connected with the external control module.
The utility model discloses further set up, fixed subassembly includes: the threaded column is arranged at one end of the sensor body; the fixing nut is assembled on the threaded column in a threaded mode and used for fixing the sensor body on the inner wall of the water storage tank; and a fixing hole for the threaded column to penetrate is formed in the top of the water storage tank.
The utility model discloses further set up, first infrared receiver infrared emitter the line between the second infrared receiver three points is right angled triangle.
The utility model is further provided with that the first light-transmitting reflecting piece is a first reflecting column which is arranged at one side of the infrared emitter and the first infrared receiver and extends into the lower end of the water storage tank; one end of the first reflection column is provided with a first reflection angle for infrared light to be reflected twice so that the first infrared receiver can smoothly receive the infrared light; the incident angle of the infrared light with respect to said first reflection angle is 45 °.
The utility model is further provided with that the second light-transmitting reflecting piece is a second reflecting column which is arranged at one side of the infrared emitter and the second infrared receiver and extends into the upper end of the water storage tank; one end of the second reflection column is provided with a second reflection angle for the infrared light to be reflected twice so that the second infrared receiver can smoothly receive the infrared light; the incident angle of the infrared light relative to the second reflection angle is 45 degrees.
The utility model discloses further set up, the sensor body is close storage water tank inner wall one side is equipped with waterproof cushion.
After the technical scheme is adopted, the utility model discloses beneficial effect does:
1. the utility model discloses in, through setting up infrared transmitter and first infrared receiver and second infrared receiver to detect the water level situation of two not co-altitude in the water storage tank, compare traditional detection mode, simple structure has reduced the detection part, has effectively reduced manufacturing cost, and utilizes the optics total reflection principle to listen the change of water level, and the accuracy is high, and the reaction is sensitive moreover.
2. The utility model discloses in, the fixed mode that adopts threaded connection is firm, and waterproof cushion has improved the leakproofness of mounted position moreover, has prevented the possibility of leaking, and the practicality is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is an exploded schematic view of the present invention;
fig. 3 is a schematic view of the installation of the present invention;
fig. 4 is a schematic diagram of the present invention.
Description of reference numerals: 1. a sensor body; 2. a fixing assembly; 3. an infrared emitter; 4. a first infrared receiver; 5. a second infrared receiver; 6. a first light-transmitting reflective member; 7. a second light-transmitting reflective member; 8. a signal transmission line; 21. a threaded post; 22. fixing a nut; 23. a fixing hole; 61. a first reflective cylinder; 62. a first reflection angle; 71. a second reflective cylinder; 72. a second angle of reflection; 9. a waterproof rubber mat; 10. a water storage tank.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment as required without making a contribution, but all the embodiments are protected by the patent law within the scope of the claims of the present invention.
The present embodiment relates to an optical dual-point liquid level sensor, as shown in fig. 1-2, comprising: a sensor body 1; the fixing component 2 is arranged on the sensor body 1 and is used for mounting the sensor body 1 on the water storage tank 10; the infrared transmitter 3 is arranged in the sensor body 1 and is used for transmitting infrared rays into the water storage tank 10; the first infrared receiver 4 is arranged in the sensor body 1 and used for receiving infrared light; the second infrared receiver 5 is arranged in the sensor body 1 and used for receiving infrared light; the first light-transmitting reflecting piece 6 is arranged on one side, close to the infrared emitter 3 and the first infrared receiver 4, of the sensor body 1; the second light-transmitting and reflecting piece 7 is arranged on one side, close to the infrared emitter 3 and the second infrared receiver 5, of the sensor body 1; and a signal transmission line 8 provided in the sensor body 1.
The first light-transmitting part is used for detecting low water level, the second light-transmitting part is used for detecting high water level, the first light-transmitting part totally reflects infrared light to the first infrared receiver 4 under an air medium, and partially reflects the infrared light to the first infrared receiver 4 under an aqueous medium; the second light-transmitting member totally reflects the infrared light to the second infrared receiver 5 under the air medium, and partially reflects the infrared light to the second infrared receiver 5 under the water medium. 8 one ends of signal transmission lines are connected with infrared transmitter 3, first infrared receiver 4, second infrared receiver 5, and one end is connected with external control module for give external control module with detected signal transmission, for supply external control module to do the water level judgement.
As shown in fig. 2 and 3, the fixing assembly 2 includes: a threaded post 21 provided at one end of the sensor body 1; and a fixing nut 22 which is screwed on the threaded column 21 and is used for fixing the sensor body 1 on the inner wall of the water storage tank 10; offer the fixed orifices 23 that supplies threaded post 21 to wear to establish on the storage water tank 10 top to install this two-point level sensor of optical formula on storage water tank 10 steadily, it should be explained that sensor body 1 is close storage water tank 10 inner wall one side and is equipped with waterproof cushion 9, and waterproof cushion 9 can improve the leakproofness of mounted position, prevents that the water in the storage water tank 10 from leaking out.
As shown in fig. 2, in this embodiment, a connection line between three points of the first infrared receiver 4, the infrared transmitter 3, and the second infrared receiver 5 is a right triangle, so that the infrared light emitted by the infrared transmitter 3 can be received by the first infrared receiver 4 and the second infrared receiver 5 at the same time, and further the water level conditions of two places in the water storage tank 10 are detected.
As shown in fig. 2 and 3, the first light-transmitting reflecting member 6 is a first reflecting column 61 which is arranged at one side of the infrared emitter 3 and the first infrared receiver 4 and extends into the lower end of the water storage tank 10; one end of the first reflection column 61 is provided with a first reflection angle 62 for the infrared light to be reflected twice, so that the first infrared receiver 4 can smoothly receive the infrared light; the second light-transmitting reflecting part 7 is a second reflecting column 71 which is arranged on one side of the infrared emitter 3 and the second infrared receiver 5 and extends into the upper end of the water storage tank 10; one end of the second reflection column 71 is provided with a second reflection angle 72 for the infrared light to be reflected twice, so that the second infrared receiver 5 can smoothly receive the infrared light; wherein the incident angles of the infrared light rays with respect to the first reflection angle 62 and the second reflection angle 72 are both 45 deg..
As shown in fig. 1 and 4, the infrared light is reflected twice at the first reflection angle 62 and the second reflection angle 72, respectively, and is received by the first infrared receiver 4 and the second infrared receiver 5, it should be noted that a light source isolation region is disposed between the infrared emitter 3 and the first infrared receiver 4 and the second infrared receiver 5, as shown in fig. 4, wherein the line AB and the line BC are two reflection surfaces at the first reflection angle 62 or the second reflection angle 72, respectively, the incident angle of the infrared light with respect to the line AB at the first reflection angle 62 or the second reflection angle 72 is 45 °, it should be noted that the refractive index of the first reflection member or the second reflection member is greater than that of air, in this embodiment, the first reflection member or the second reflection member is made of transparent PC material, and under an air medium, the critical angle (incident angle) of the infrared light is equal to 45 °, at this moment, the infrared light is at the line AB, The total reflection occurs on the BC line, and is received by the first infrared receiver 4 or the second infrared receiver 5; under aqueous medium, infrared ray takes place refraction and reflection on first reflection angle 62 or second reflection angle 72, only partial infrared ray takes place the reflection on AB line, BC line promptly, and be received by first infrared receiver 4 or second infrared receiver 5, therefore outside control module judges the water level in the storage water tank 10 according to the signal intensity of the infrared ray that first infrared receiver 4 and second infrared receiver 5 received promptly, thereby avoid the interference of other natural factors, simple accurate acquisition detection value.
When the water level is low, the first infrared receiver 4 receives part of reflected infrared light, and the second infrared receiver 5 receives all reflected infrared light; when the water level is higher than the low water level, the first infrared receiver 4 receives partially reflected infrared light, the second infrared receiver 5 receives partially reflected infrared light, and when the water level is lower than the low water level, the first infrared receiver 4 receives completely reflected infrared light, and the second infrared receiver 5 receives completely reflected infrared light.
The working principle of the utility model is as follows: the infrared emitter 3, the first infrared receiver 4 and the second infrared receiver 5 are arranged, so that the water level conditions of two different heights in the water storage tank 10 are detected, compared with the traditional detection mode, the structure is simple, detection parts are reduced, the production cost is effectively reduced, the change of the water level is detected by utilizing the optical total reflection principle, the accuracy is high, and the response is sensitive; and meanwhile, the fixing mode of threaded connection is adopted for stable assembly, the waterproof rubber gasket 9 improves the sealing performance of the mounting position, the possibility of water leakage is prevented, and the practicability is high.
The above description is only for the purpose of illustration and not limitation, and other modifications or equivalent replacements made by those skilled in the art to the technical solution of the present invention should be covered by the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921545135.0U CN210198501U (en) | 2019-09-17 | 2019-09-17 | An optical two-point liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921545135.0U CN210198501U (en) | 2019-09-17 | 2019-09-17 | An optical two-point liquid level sensor |
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| Publication Number | Publication Date |
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| CN210198501U true CN210198501U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921545135.0U Active CN210198501U (en) | 2019-09-17 | 2019-09-17 | An optical two-point liquid level sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654623A (en) * | 2021-09-10 | 2021-11-16 | 添可智能科技有限公司 | Cleaning equipment and liquid storage barrel |
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2019
- 2019-09-17 CN CN201921545135.0U patent/CN210198501U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654623A (en) * | 2021-09-10 | 2021-11-16 | 添可智能科技有限公司 | Cleaning equipment and liquid storage barrel |
| CN113654623B (en) * | 2021-09-10 | 2023-08-01 | 添可智能科技有限公司 | Cleaning device and liquid storage barrel |
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