CN215263121U - Turbidity sensor - Google Patents
Turbidity sensor Download PDFInfo
- Publication number
- CN215263121U CN215263121U CN202121824918.XU CN202121824918U CN215263121U CN 215263121 U CN215263121 U CN 215263121U CN 202121824918 U CN202121824918 U CN 202121824918U CN 215263121 U CN215263121 U CN 215263121U
- Authority
- CN
- China
- Prior art keywords
- light
- ultraviolet
- turbidity sensor
- sdbs
- turbidity
- 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
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
本申请公开了一种浊度传感器，所述浊度传感器包括：相对设置的紫外发射器和紫外探测器；所述紫外发射器通过出光口出射紫外光，所述紫外探测器通过入光口采集紫外光；所述出光口与所述入光口之间具有预设宽度的采样通道；其中，所述采样通道中具有SDBS的待测液体时，所述紫外探测器基于所采集的紫外光，产生与所述SDBS浓度相关的电参数。本方案通过待测液体中SDBS的浓度与电参数的关系来检测SDBS的浓度，可以精确的判断待测液体的浊度，分辨率较高。
The application discloses a turbidity sensor, the turbidity sensor includes: an ultraviolet emitter and an ultraviolet detector arranged oppositely; the ultraviolet emitter emits ultraviolet light through a light exit port, and the ultraviolet detector collects through the light entrance port Ultraviolet light; a sampling channel with a preset width between the light exit port and the light entrance port; wherein, when there is SDBS liquid to be tested in the sampling channel, the ultraviolet detector based on the collected ultraviolet light, Electrical parameters related to the SDBS concentration were generated. This scheme detects the concentration of SDBS through the relationship between the concentration of SDBS in the liquid to be tested and the electrical parameters, and can accurately judge the turbidity of the liquid to be tested with high resolution.
Description
Technical Field
The utility model belongs to the technical field of turbidity sensor technique and specifically relates to a turbidity sensor and contain SDBS (sodium dodecyl benzene sulfonate) turbidity calculation method of the liquid that awaits measuring.
Background
Along with the development of scientific technology and the improvement of user demands, more and more sensing technologies are widely applied to daily life and work of people, great convenience is brought to the daily life and work of people, and the sensing technology becomes an indispensable important tool for people at present.
The turbidity sensor is a low-cost sensor specially used for household appliances, and is mainly used for measuring the water turbidity degree of products such as washing machines, dish washing machines and the like. The cleanliness of the washed articles is judged by measuring the dirty degree of water, so that the optimal washing time is determined, the washing effect can be ensured, and the waste of water and electricity can be avoided.
In the prior art, when the turbidity of water in the cleaning equipment is reduced to a certain degree, impurities in the water have little influence on the photocurrent of the receiving end of the turbidity sensor, so that whether the water is thoroughly cleaned or not can not be accurately distinguished, and the resolution ratio is low.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a turbidity sensor and contain the turbidity calculation method of the liquid that SDBS awaits measuring detects the concentration of SDBS through the relation of the concentration and the electrical parameter of SDBS in the liquid that awaits measuring, and the turbidity of the liquid that awaits measuring of judgement that can be accurate, resolution ratio are higher.
In order to achieve the above object, the present invention provides the following technical solutions:
a turbidity sensor, comprising:
the ultraviolet emitter and the ultraviolet detector are oppositely arranged;
the ultraviolet emitter emits ultraviolet light through the light outlet, and the ultraviolet detector collects ultraviolet light through the light inlet;
a sampling channel with a preset width is arranged between the light outlet and the light inlet;
wherein, when the sampling channel is provided with the liquid to be detected of the SDBS, the ultraviolet detector generates an electrical parameter related to the concentration of the SDBS based on the collected ultraviolet light.
Preferably, in the turbidity sensor described above, there is an encapsulating housing having opposing first and second surfaces;
wherein the ultraviolet emitter and the ultraviolet detector are encapsulated in the encapsulation shell; the first surface is provided with a groove, the groove serves as the sampling channel, and the two opposite side walls of the groove are respectively provided with the light outlet and the light inlet.
Preferably, in the turbidity sensor, a circuit board is arranged in the package housing, and the ultraviolet emitter and the ultraviolet detector are electrically connected to the circuit board;
the second surface is provided with a power supply pin and an output pin, wherein the power supply pin and the output pin are connected with the circuit board, the power supply pin is used for inputting working voltage for the turbidity sensor, and the output pin is used for outputting the electrical parameters.
Preferably, in the turbidity sensor, the ultraviolet emitter is an ultraviolet LED emitting ultraviolet light of 220-225 nm;
the ultraviolet detector is an ultraviolet photosensitive diode capable of responding to ultraviolet light of 220nm-240 nm.
Preferably, in the turbidity sensor described above, the width of the sampling channel is in the range of 5-8 mm.
Preferably, in the turbidity sensor, the light-emitting side of the ultraviolet emitter is a first convex structure, and a first light guide column is attached and fixed to the surface of the first convex structure; one side of the first light guide column is a first concave curved surface matched with the first convex structure, and the other opposite side of the first light guide column is a plane flush with the light outlet;
the light emitting side of the ultraviolet detector is provided with a second convex structure, and a second light guide column is fixedly attached to the surface of the second convex structure; one side of the second light guide column is a second concave curved surface matched with the second convex structure, and the other opposite side of the second light guide column is a plane flush with the light inlet.
Preferably, in the turbidity sensor, the first light guide column is an ultraviolet-transparent glass light guide column or a light-transparent high polymer light guide column.
The second light guide column is an ultraviolet-transmitting glass light guide column or a light-transmitting high polymer light guide column.
The utility model also provides a turbidity calculation method who contains the SDBS liquid that awaits measuring, turbidity calculation method includes:
obtaining an electrical parameter corresponding to the liquid to be measured by using the turbidity sensor;
and calculating the concentration of the SDBS in the liquid to be detected based on the corresponding relation between the electrical parameters and the concentration of the SDBS.
According to the above description, the utility model discloses among the turbidity sensor that technical scheme provided and the turbidity calculation method who contains the SDBS liquid that awaits measuring, turbidity sensor has the relative ultraviolet emitter and the ultraviolet detector that set up, ultraviolet emitter passes through light outlet outgoing ultraviolet ray, ultraviolet detector gathers the ultraviolet ray through going into the light outlet, has the sampling channel of predetermineeing the width between light outlet and the income light outlet, and when having the liquid that awaits measuring of SDBS in the sampling channel, the ultraviolet detector is based on the ultraviolet ray of gathering, produces the electrical parameter relevant with the SDBS concentration. The method detects the concentration of the SDBS through the relation between the concentration of the SDBS in the liquid to be detected and the electrical parameter, can accurately judge the turbidity of the liquid to be detected, and has high resolution.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
The structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims, it is understood that these drawings and their equivalents are merely illustrative and not intended to limit the scope of the present disclosure.
FIG. 1 is a top view of a turbidity sensor;
FIG. 2 is a cross-sectional view of the turbidity sensor of FIG. 1, taken in the direction AA';
fig. 3 is a top view of a turbidity sensor according to an embodiment of the present invention;
FIG. 4 is a cut-away view of the turbidity sensor of FIG. 3, taken in the direction BB';
fig. 5 is a graph illustrating the relationship between the SDBS concentration and the electrical parameter according to an embodiment of the present invention.
Detailed Description
Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the application are shown, and in which it is to be understood that the embodiments described are merely illustrative of some, but not all, of the embodiments of the application. 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 application.
The turbidity sensor is a low-cost sensor specially used for household appliances, and is mainly used for measuring the water turbidity degree of products such as washing machines, dish washing machines and the like. The degree of cleanliness of the washed items is judged by measuring the degree of contamination of the water, thereby determining an optimum washing time.
The impurity and the pollutant of current domestic washing machine, dish washer in the early cleaning process aquatic are more, and infrared turbidity sensor of correlation formula all can effectively detect, and the detergent of aquatic impurity and pollutant but the aquatic is few when wasing the later stage is not certain sanitization, and general turbidity sensor can't distinguish.
Referring to fig. 1 and 2, fig. 1 is a top view of a turbidity sensor, and fig. 2 is a cross-sectional view of the turbidity sensor shown in fig. 1 in the AA' direction. The turbidity sensor is a correlation type optical turbidity sensor, infrared light is used as a light sensing device of the turbidity sensor, the turbidity sensor is provided with an infrared emitter and an infrared detector which are oppositely arranged, the infrared emitter emits infrared light through an emitting end 11, the infrared detector collects the infrared light through a receiving end 12, the emitting end 11 adopts an infrared emitting diode with the wavelength of 940nm, the receiving end 12 adopts a phototriode with the response wavelength of 750 plus 1100nm, the emitting end 11 and the receiving end 12 are oppositely arranged, the emitting end 11 and the receiving end 12 are arranged in a packaging shell, a sampling channel 13 with the preset width L is arranged between the emitting end 11 and the receiving end 12, the turbidity of water in the sampling channel 13 can influence the photocurrent of the receiving end 12, and the turbidity of the water is detected through the change of the photocurrent of the receiving end 12.
The infrared light is used as the detection light, when the turbidity of water in the cleaning equipment is reduced to a certain degree, the influence of impurities in the water on the photocurrent of the receiving end 12 of the turbidity sensor is very small, whether the water is thoroughly cleaned or not can not be accurately distinguished, and the resolution ratio of the turbidity sensor in the scheme is low.
The existing household detergent contains sodium dodecyl benzene sulfonate (SDBS for short), and the SDBS is a surfactant, has the characteristics of difficult oxidation, strong foamability and high detergency, and is widely applied to household detergents.
The inventor researches and discovers that the absorption spectrum of SDBS is ultraviolet wavelength of 222.5nm, impurities and pollutants in water in the later washing period of washing machines and dishwashers are few by using an ultraviolet emitter and an ultraviolet detector as light sensing devices, detergent in the water also has residues, the SDBS in the detergent absorbs ultraviolet light, photoelectric current generated by a photodiode with the response wavelength of 220-240nm outputs different photoelectric currents due to different SDBS contents in the water, the higher the SDBS content, the lower the output photoelectric current is, and the higher the output photoelectric current is.
Because the SDBS has strong ultraviolet light absorption capacity, the change of the small concentration of the SDBS in water can cause the obvious change of photocurrent, the concentration of the SDBS in the water is detected through the ultraviolet light, the turbidity of the water is judged according to the difference of the photocurrent, and the method has high sensitivity and detection precision.
Therefore, the utility model provides a turbidity sensor and contain the turbidity calculation method of the liquid that SDBS awaits measuring can confirm the turbidity of the liquid that awaits measuring through detecting SDBS concentration in the liquid that awaits measuring.
The turbidity sensor that this application embodiment provided includes:
the ultraviolet emitter and the ultraviolet detector are oppositely arranged;
the ultraviolet emitter emits ultraviolet light through the light outlet, and the ultraviolet detector collects ultraviolet light through the light inlet;
a sampling channel with a preset width is arranged between the light outlet and the light inlet;
wherein, when the sampling channel is provided with the liquid to be detected of the SDBS, the ultraviolet detector generates an electrical parameter related to the concentration of the SDBS based on the collected ultraviolet light.
According to the above description, the utility model discloses among the turbidity sensor that technical scheme provided and the turbidity calculation method who contains the liquid that SDBS awaits measuring, when having the liquid that awaits measuring of SDBS in the sampling channel, the ultraviolet detector produces the electrical parameter relevant with SDBS concentration based on the ultraviolet ray of gathering. The concentration of the SDBS is detected through the relation between the concentration of the SDBS in the liquid to be detected and the electrical parameter, the turbidity of the liquid to be detected can be accurately judged, and the resolution ratio is high.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 3 and 4, fig. 3 is a top view of a turbidity sensor provided in an embodiment of the present invention, and fig. 4 is a cross-sectional view of the turbidity sensor shown in fig. 3 in the direction BB'. As shown in fig. 3 and 4, the turbidity sensor includes:
an ultraviolet emitter 21 and an ultraviolet detector 22 which are oppositely arranged;
the ultraviolet emitter 21 emits ultraviolet light through the light outlet, and the ultraviolet detector 22 collects ultraviolet light through the light inlet;
a sampling channel 23 with a preset width is arranged between the light outlet and the light inlet; the width range of the sampling channel 23 can be 5-8mm, preferably 6mm or 7mm, and the width range can enable ultraviolet light to have enough propagation distance so as to effectively detect the concentration of the SDBS in the liquid to be detected;
wherein, when the liquid to be tested with the SDBS is in the sampling channel 23, the ultraviolet detector 22 generates an electrical parameter related to the concentration of the SDBS based on the collected ultraviolet light.
The turbidity sensor provided by the application is a correlation type optical turbidity sensor, the ultraviolet emitter 21 and the ultraviolet detector 22 are used as light sensing devices of the turbidity sensor, the ultraviolet emitter 21 is an ultraviolet LED for emitting 220-plus 225nm ultraviolet light, the wavelength range of the emission wavelength of the ultraviolet emitter 21 can be set based on requirements, and is not limited to 220-plus 225nm ultraviolet light, as long as the wavelength range of the ultraviolet wavelength of 222.5nm absorbed by SDBS can be included, the emission wavelength range of the ultraviolet emitter 21 is not specifically limited in the embodiment of the application, the ultraviolet detector 22 is an ultraviolet photodiode capable of responding to 220-plus 240nm ultraviolet light, the wavelength range of the ultraviolet wavelength detected by the ultraviolet detector 22 can be set based on requirements, and is not limited to 220-plus 240nm ultraviolet light, as long as the wavelength range of the ultraviolet wavelength of 222.5nm absorbed by SDBS can be included.
As shown in fig. 3 and 4, the turbidity sensor has an enclosure housing 26, the enclosure housing 26 having first and second opposing surfaces; wherein the ultraviolet emitter 21 and the ultraviolet detector 22 are encapsulated in the encapsulating shell 26; the first surface is provided with a groove, the groove is used as the sampling channel 23, and the two opposite side walls of the groove are respectively provided with the light outlet and the light inlet.
Further, the package housing 26 has a circuit board (not shown) therein, and the ultraviolet emitter 21 and the ultraviolet detector 22 are electrically connected to the circuit board; the second surface is provided with a power supply pin and an output pin, wherein the power supply pin and the output pin are connected with the circuit board, the power supply pin is used for inputting working voltage for the turbidity sensor, and the output pin is used for outputting the electrical parameters.
The embodiment of the utility model provides an in, when having SDBS's the liquid that awaits measuring in sampling channel 23, ultraviolet emitter 21 passes through light-emitting window outgoing ultraviolet ray, and ultraviolet detector 22 gathers the ultraviolet ray through going into the light-emitting window to based on the ultraviolet ray of gathering, produce the electrical parameter relevant with the SDBS concentration. The concentration of the SDBS is detected by utilizing the relation between the concentration of the SDBS and the electrical parameter, the turbidity of the liquid to be detected can be accurately judged, and the resolution is improved.
In the embodiment of the present invention, the light emitting side of the ultraviolet emitter 21 is a first protruding structure, and a first light guiding pillar 24 is attached and fixed on the surface of the first protruding structure; one side of the first light guide column 24 is a first concave curved surface adapted to the first convex structure, and the other opposite side is a plane flush with the light outlet; the first concave curved surface and the first convex structure are in gapless fit and fixation.
The light-emitting side of the ultraviolet detector 22 is a second convex structure, and a second light guide pillar 25 is attached and fixed on the surface of the second convex structure; one side of the second light guide pillar 25 is a second concave curved surface adapted to the second convex structure, and the other opposite side is a plane flush with the light inlet. And the second concave curved surface is fixedly attached to the second convex structure in a gapless manner.
The first light guide column 24 may be an ultraviolet-transparent glass light guide column or a light-transparent high polymer light guide column; the second light guide pillar 25 may be an ultraviolet-transparent glass light guide pillar or a light-transparent high polymer light guide pillar.
The embodiment of the utility model provides an in, under the unchangeable condition of whole overall dimension, ultraviolet emitter 21's transmitting terminal uses the ultraviolet LED that wavelength is 220 + 225nm as the light emitting source, install this ultraviolet LED in turbidity sensor's encapsulation casing 26, can use quartz glass to derive the ultraviolet ray that sends as first leaded light post 24, ultraviolet detector 22's receiving terminal uses response wavelength to be 220 + 240 nm's ultraviolet photosensitive diode, install this ultraviolet photosensitive diode in turbidity sensor's encapsulation casing 26 just right with the transmitting terminal, receiving terminal place ahead installation quartz glass's second leaded light post 25 is with the leading-in this ultraviolet photosensitive diode surface of received ultraviolet ray, transmitting terminal and receiving terminal are just right in sampling channel 23's both sides.
When the liquid to be tested has SDBS in the sampling channel 23, the ultraviolet emitter 21 emits ultraviolet light through the emitting end, and the ultraviolet detector 22 collects ultraviolet light through the receiving end and generates an electrical parameter related to the concentration of SDBS based on the collected ultraviolet light. The concentration of the SDBS is detected by utilizing the relation between the concentration of the SDBS and the electrical parameter, the turbidity of the liquid to be detected can be accurately judged, and the resolution is improved.
The detection principle is as follows: the existing household detergent contains sodium dodecylbenzene sulfonate (SDBS), the absorption spectrum of the SDBS is ultraviolet wavelength of 222.5nm, an ultraviolet LED with 220-225nm and an ultraviolet photodiode with 220-240nm response wavelength are used as light sensing devices of the turbidity sensor, impurities and pollutants in water are few in the later stage of washing of the washing machine and the dish-washing machine, but the detergent in the water still has residues, SDBS in the detergent can absorb ultraviolet light emitted by the ultraviolet LED with the wavelength of 220-225nm, the electric parameters generated by the ultraviolet photodiode with the response wavelength of 220-240nm can output different electric parameters due to different SDBS contents in the water, the higher the SDBS content is, the lower the output electric parameters are, the higher the output electric parameters are, the turbidity of water is judged according to different electrical parameters output by the ultraviolet photosensitive diodes with different SDBS contents in the water.
The solution to be tested containing the SDBS can be scanned by an ultraviolet spectrophotometer, and the SDBS has a characteristic absorption peak at the wavelength of 222.5nm in an ultraviolet region, so that the absorption spectrum of the SDBS is determined to be 222.5 nm. Pollutants and detergents in water coexist when a household washing machine and a dishwasher work, the content of SDBS in the water can influence the electric parameters output by the ultraviolet photodiode with the response wavelength of 220-240nm, the higher the content of SDBS is, the lower the output electric parameters are, the lower the content of SDBS is, the higher the output electric parameters are, and therefore whether the washing is clean or not is judged.
The electrical parameter in the present embodiment is the photocurrent of the uv detector 22. The inventor researches and finds that the concentration X of the SDBS and the electrical parameter Y have the following corresponding relation:
where K is a known constant for a given turbidity sensor. The specific value of K can be determined by collecting photocurrents at different SDBS concentrations and performing linear fitting.
In the embodiment of the present application, K is 0.0409, so the above formula is specifically:
wherein the degree of fit R of the formula (2)20.9999, the concentration X of SDBS can be accurately calculated by the electrical parameter Y.
Fig. 5 shows a curve corresponding to equation (2), and fig. 5 is a graph showing a relationship between the SDBS concentration and the electrical parameter according to an embodiment of the present invention, from which it can be seen that the minimum concentration of the SDBS detectable by the turbidity sensor is 5 mg/L.
Based on the above embodiment, the utility model discloses another embodiment still provides a turbidity calculation method that contains the liquid that SDBS awaits measuring, turbidity calculation method includes:
the method comprises the steps of firstly obtaining an electrical parameter corresponding to the liquid to be detected by using the turbidity sensor described in the embodiment, and then calculating the concentration of the SDBS in the liquid to be detected based on the corresponding relation between the electrical parameter and the concentration of the SDBS.
Can know through the above-mentioned description, the utility model discloses among the technical scheme, the concentration that detects SDBS through the concentration of SDBS in the liquid that awaits measuring and electric parameter's relation, the turbidity of the liquid that awaits measuring of judgement that can be accurate, resolution ratio is higher.
The embodiments in the present description are described in a progressive manner, or in a parallel manner, or in a combination of a progressive manner and a parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other. The turbidity calculation method for the liquid to be measured containing the SDBS disclosed in the embodiment corresponds to the turbidity sensor disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the turbidity sensor.
It should be noted that in the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only used for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
It is further 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 an 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 article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121824918.XU CN215263121U (en) | 2021-08-05 | 2021-08-05 | Turbidity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121824918.XU CN215263121U (en) | 2021-08-05 | 2021-08-05 | Turbidity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215263121U true CN215263121U (en) | 2021-12-21 |
Family
ID=79497019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121824918.XU Active CN215263121U (en) | 2021-08-05 | 2021-08-05 | Turbidity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215263121U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484263A (en) * | 2021-08-05 | 2021-10-08 | 哈尔滨海格微电子科技有限公司 | Turbidity sensor and turbidity calculation method of liquid containing SDBS to be detected |
-
2021
- 2021-08-05 CN CN202121824918.XU patent/CN215263121U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484263A (en) * | 2021-08-05 | 2021-10-08 | 哈尔滨海格微电子科技有限公司 | Turbidity sensor and turbidity calculation method of liquid containing SDBS to be detected |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9709505B2 (en) | Turbidity sensor and control method thereof | |
| CN111793931B (en) | Household washing machine or dish washing machine and optical sensor thereof | |
| CN106996003B (en) | Detergent feeding control method and washing machine | |
| US20070046942A1 (en) | Meter for measuring the turbidity of fluids using reflected light | |
| US20020159062A1 (en) | Focused laser light turbidity sensor apparatus and method for measuring very low concentrations of particles in fluids | |
| US7733097B2 (en) | Method for determining a property of a fluid for a household device | |
| CN105615800A (en) | Auto-wash control method and device of dishwasher and dishwasher | |
| CN100401040C (en) | Photoelectric Sensors | |
| KR101441359B1 (en) | Measurement apparatus for transmittance of cover glass for photovoltaic cell | |
| US10365217B2 (en) | Liquid presence/turbidity sensor using single optical channel | |
| KR102111673B1 (en) | Turbidity sensor and control method thereof | |
| KR20110127183A (en) | Turbidity Sensors for Home Appliances | |
| KR100850831B1 (en) | Method for operating a water-bearing domestic appliance and a corresponding domestic appliance | |
| CN113484263A (en) | Turbidity sensor and turbidity calculation method of liquid containing SDBS to be detected | |
| CN215727692U (en) | Reflection type turbidity sensor | |
| US9435641B2 (en) | Optical angle measurement | |
| CN216350336U (en) | Optical water cleanliness sensor | |
| CN213544385U (en) | Turbidity and TDS sensor | |
| CN215179666U (en) | Integrated temperature detection's turbidity sensor | |
| CN114264635A (en) | Turbidity and TDS sensor and manufacturing method thereof | |
| CN109709165A (en) | A kind of dish-washing machine cleanliness detection method based on relative dielectric constant | |
| JP2011036528A (en) | Dishwasher | |
| CN211697500U (en) | Turbidity sensor | |
| CN209945996U (en) | Carrier structure for ultraviolet-visible spectrophotometer | |
| US20250377298A1 (en) | Water quality sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |