CN210198500U - Photoelectric liquid level sensor - Google Patents
Photoelectric liquid level sensor Download PDFInfo
- Publication number
- CN210198500U CN210198500U CN201921399553.3U CN201921399553U CN210198500U CN 210198500 U CN210198500 U CN 210198500U CN 201921399553 U CN201921399553 U CN 201921399553U CN 210198500 U CN210198500 U CN 210198500U
- Authority
- CN
- China
- Prior art keywords
- light
- base
- emitting device
- photosensitive device
- photosensitive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a photoelectric type level sensor, include: a base; the PCB board is arranged below the base; the light-emitting device is arranged on the base and connected with the PCB; the photosensitive device is arranged on the base and connected with the PCB; the lens is arranged on the tops of the light-emitting device and the photosensitive device; a signal line connected to the PCB; the light-emitting device and the photosensitive device are obliquely arranged on the base, the extension lines of the central lines of the light-emitting device and the photosensitive device are intersected, and the emitting end of the light-emitting device and the receiving end of the photosensitive device are oppositely arranged; compared with the prior art, the utility model discloses a photoelectric type level sensor, luminescent device and photosensitive device slope locate the base, and the light that luminescent device sent directly passes to photosensitive device after the lens reflection, and the light that luminescent device sent only can be received by photosensitive device through once reflecting, has reduced the volume that light was gone out by the lens refraction, reduces the probability of erroneous judgement.
Description
Technical Field
The utility model relates to a sensor technical field specifically, relates to a photoelectric type level sensor.
Background
The photoelectric sensor is widely used in household appliances and is used for monitoring liquid level, when the liquid level is lower than the sensor or no water is present, the light emitted by the light emitting device can be received by the photosensitive device, and when the liquid level is lower than the light emitting device, the light emitted by the light emitting device can not be received by the photosensitive device; existing photoelectric level sensors; the light emitting device and the photosensitive device are vertically arranged on the base, a lens arranged above the light emitting device and the photosensitive device is an isosceles right triangle, two inclined planes of the isosceles right triangle correspond to the light emitting device and the photosensitive device respectively, light rays emitted by the light emitting device are totally reflected to the inclined plane corresponding to the lens and the photosensitive device through the inclined plane corresponding to the lens and the photosensitive device, then the light rays are reflected to the photosensitive device through the inclined plane corresponding to the lens and the photosensitive device, light beams emitted by the light emitting device can be received by the photosensitive device only through twice total reflection, part of the light rays can be refracted out by the lens, when water drops exist on any one of the two inclined planes of the light emitting device, the photosensitive device and the lens, the light rays are refracted out by the water drops again, and finally the photosensitive device can not receive the light rays, and the sensor is misjudged under the condition that.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the problem that prior art exists, provide a photoelectric type level sensor.
An opto-electronic level sensor, comprising:
a base;
the PCB board is arranged below the base;
the light-emitting device is arranged on the base and connected with the PCB;
the photosensitive device is arranged on the base and connected with the PCB;
the lens is arranged on the tops of the light-emitting device and the photosensitive device;
a signal line connected to the PCB;
the light-emitting device and the photosensitive device are obliquely arranged on the base, the extension lines of the central lines of the light-emitting device and the photosensitive device are intersected, and the emitting end of the light-emitting device and the receiving end of the photosensitive device are oppositely arranged.
According to the utility model discloses an embodiment still includes the casing, and the casing is located to the base, and lens are located the casing and are located light emitting device and photosensitive device top.
According to an embodiment of the present invention, the housing is provided with a lead tube, and the signal line passes through the lead tube and extends out of the housing.
According to the utility model discloses an embodiment is equipped with the shading portion on the base, and the shading portion both sides are located to luminescent device and photosensitive device symmetry.
According to an embodiment of the present invention, the included angle between the center line of the light emitting device and the center line of the base is equal to the included angle between the center line of the light sensing device and the center line of the base.
According to an embodiment of the present invention, the included angle between the center line of the light emitting device and the center line of the base and the included angle between the center line of the light sensing device and the center line of the base are 45 degrees.
Compared with the prior art, the utility model discloses a photoelectric type level sensor has following advantage:
the utility model discloses a photoelectric type level sensor, luminescent device and photosensitive device slope locate the base, and the light that luminescent device sent directly passes to photosensitive device after the lens reflection, and the light that luminescent device sent only can be received by photosensitive device through once reflecting, has reduced the volume that light was gone out by the lens refraction, reduces the probability of erroneous judgement.
Drawings
Fig. 1 is a cross-sectional view of the photoelectric liquid level sensor of the present invention;
FIG. 2 is a reflection diagram of the photoelectric liquid level sensor of the present invention when the liquid level is lower than the light emitting device;
FIG. 3 is a reflection diagram of the photoelectric liquid level sensor of the present invention when the liquid level is higher than the light emitting device;
the utility model discloses realization and the advantage of function will combine the embodiment, will make further explanation with the attached drawing.
Detailed Description
In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
It should be noted that all the directional indicators (such as upper, lower, left and right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for description purposes, not specifically referring to the order or sequence, and are not intended to limit the present invention, but only to distinguish the components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified in conjunction with the accompanying drawings as follows:
referring to fig. 1, fig. 1 is a cross-sectional view of a photoelectric liquid level sensor according to the present invention; as shown in the figure, the photoelectric liquid level sensor comprises a shell 1, a base 2, a PCB 3, a light-emitting device 4, a photosensitive device 5, a lens 6 and a signal wire 7, wherein the shell 1 is of a hollow structure, the shell 1 is provided with a lead tube 11, and the base 2 is arranged in the shell 1; the PCB 3 is arranged below the base 2; the light-emitting device 4 is a light-emitting diode, the light-emitting device 4 is arranged on the base 2 and connected with the PCB 3, the photosensitive device 5 is a photosensitive resistor or a photosensitive diode, and the photosensitive device 5 is arranged on the base 2 and connected with the PCB 3; the lens 6 is arranged on the shell 1 and positioned at the top of the light-emitting device 4 and the photosensitive device 5, and the surfaces of the lens 6 corresponding to the light-emitting device 4 and the photosensitive device 5 are planes parallel to the base 2; the signal wire 7 is connected with the PCB 3 and penetrates through the lead tube 11 to extend out of the shell 1, the signal wire 7 is used for being connected with the chip and transmitting a signal when the photosensitive device 5 receives light to the chip, when the photosensitive device 5 receives light and cannot receive light, the signal transmitted to the chip by the signal wire 7 is different, and the chip judges whether the liquid level exceeds the light-emitting device 4 according to the signal change; the light-emitting device 4 and the photosensitive device 5 are obliquely arranged on the base 2, the extension lines of the central lines of the light-emitting device 4 and the photosensitive device 5 are intersected, and the transmitting end of the light-emitting device 4 is opposite to the receiving end of the photosensitive device 5; the light emitted by the light-emitting device 4 can be reflected to the photosensitive device 5 through transparent primary reflection, so that the light loss can be reduced, and the probability of misjudgment is reduced.
Referring to fig. 1 again, in the present embodiment, as shown in the figure, the base 2 is provided with a light shielding portion 21, and the light emitting device 4 and the light sensing device 5 are symmetrically arranged at two sides of the light shielding portion 21; the light beam emitted by the light emitting device 4 can only be received by the light sensing device 5 by reflection through the lens 6.
Referring to fig. 1 again, in the present embodiment, as shown in the figure, an included angle between a center line of the light emitting device 4 and a center line of the base 2 is equal to an included angle between a center line of the light sensing device 5 and a center line of the base 2; the light emitted by the light-emitting device 4 is totally reflected by the lens 6 and then received by the photosensitive device 5, and the included angle between the central line of the light-emitting device 4 and the central line of the base 2 is equal to the included angle between the central line of the photosensitive device 5 and the central line of the base 2, so that the light reflected by the lens 6 is totally reflected to the receiving end of the photosensitive device 5, and partial light deviation is avoided and cannot be received by the photosensitive device 5.
In the embodiment, the included angle between the central line of the light-emitting device 4 and the central line of the base 2 and the included angle between the central line of the light-sensing device 5 and the central line of the base 2 are both 45 degrees; the intersection point of the central line of the light-emitting device 4 and the central line of the photosensitive device 5 forms a 90-degree right angle, and the light emitted by the light-emitting device 4 is totally reflected by the lens 6 and is just received by the photosensitive device 5.
The utility model discloses a photoelectric type level sensor's theory of operation does: referring to fig. 2, fig. 2 is a reflection diagram of the photoelectric liquid level sensor of the present invention when the liquid level is lower than the light emitting device; as shown in the figure, the light-emitting device 4 and the photosensitive device 5 are obliquely arranged on the base 2, when the liquid level is lower than the light-emitting device 4, the light emitted by the light-emitting device 4 is totally reflected by the lens 6 and then directly transmitted to the photosensitive device 5, the light emitted by the light-emitting device 4 can be received by the photosensitive device 5 only through once total reflection, the quantity of the light refracted by the lens 6 is reduced, and the probability of misjudgment can be reduced; referring to fig. 3, fig. 3 is a reflection diagram of the photoelectric liquid level sensor of the present invention when the liquid level is higher than the light emitting device; as shown in the figure, the light-emitting device 4 and the photosensitive device 5 are obliquely arranged on the base 2, when the liquid level is higher than that of the light-emitting device 4, light rays directly penetrate out of the lens and then are refracted, and the light beams cannot be received by the photosensitive device 5.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An opto-electronic level sensor, comprising:
a base;
the PCB board is arranged below the base;
the light-emitting device is arranged on the base and connected with the PCB;
the photosensitive device is arranged on the base and connected with the PCB;
the lens is arranged on the tops of the light-emitting device and the photosensitive device;
a signal line connected to the PCB;
the light-emitting device and the photosensitive device are obliquely arranged on the base, the extension line of the central line of the light-emitting device is intersected with that of the photosensitive device, and the emitting end of the light-emitting device is opposite to the receiving end of the photosensitive device.
2. The photoelectric liquid level sensor according to claim 1, wherein the base is provided with a light shielding portion, and the light emitting device and the light sensing device are symmetrically arranged on two sides of the light shielding portion.
3. The optoelectronic fluid level sensor of claim 1, wherein an angle between a centerline of the light emitting device and a centerline of the pedestal is equal to an angle between a centerline of the light sensing device and a centerline of the pedestal.
4. The photoelectric liquid level sensor according to claim 2, wherein an included angle between a center line of the light emitting device and a center line of the base and an included angle between a center line of the light sensing device and a center line of the base are both 45 degrees.
5. The optoelectronic fluid level sensor of claim 1, further comprising a housing, wherein the base is disposed in the housing, and the lens is disposed in the housing on top of the light emitting device and the light sensing device.
6. The optoelectronic fluid level sensor of claim 5, wherein the housing is provided with a lead tube through which the signal wire extends out of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921399553.3U CN210198500U (en) | 2019-08-27 | 2019-08-27 | Photoelectric liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921399553.3U CN210198500U (en) | 2019-08-27 | 2019-08-27 | Photoelectric liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210198500U true CN210198500U (en) | 2020-03-27 |
Family
ID=69866294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921399553.3U Active CN210198500U (en) | 2019-08-27 | 2019-08-27 | Photoelectric liquid level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210198500U (en) |
-
2019
- 2019-08-27 CN CN201921399553.3U patent/CN210198500U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0121848B1 (en) | Apparatus for detecting bubbles in a liquid | |
| US3639770A (en) | Optoelectronic semiconductor device | |
| US4246489A (en) | Liquid level detector for detecting a liquid level when reaching a prescribed height | |
| US4961069A (en) | Dual optical level monitor | |
| US3636360A (en) | Apparatus for detection of liquid level in transparent tube comprising photocell located to receive light which has been totally reflected | |
| JP5016677B2 (en) | Tilt sensor with optoelectronic level | |
| JPS63103920A (en) | Optical fiber fluid sensor | |
| CN208606859U (en) | A kind of photoelectric liquid level sensor | |
| US6661504B2 (en) | Failure detecting optoelectronic sensor | |
| CN210198500U (en) | Photoelectric liquid level sensor | |
| US20110242540A1 (en) | Rain sensor | |
| JP2002148101A (en) | Liquid detector | |
| CN210199702U (en) | Gesture recognition sensor | |
| CN107576369B (en) | Optical fiber continuous liquid level sensor based on end face reflection coupling | |
| CN215952692U (en) | Multipoint liquid level contact type infrared detection sensor | |
| CN210169720U (en) | Cooking utensil | |
| CN214623036U (en) | Photoelectric sensing device for detecting transparent object | |
| CN210198501U (en) | Optical double-point liquid level sensor | |
| CN211013007U (en) | Line reflection type laser sensor | |
| CN210346699U (en) | Novel sensor and laser level meter using same | |
| CN201477217U (en) | Non-contact type liquid detector in pipe | |
| CN203443636U (en) | Photoelectric liquid level sensor | |
| CN220708487U (en) | Liquid level detection device | |
| CN218566626U (en) | Non-contact liquid level detection device | |
| US20080078924A1 (en) | Sensor system for liquid detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |