WO2021139018A1

WO2021139018A1 - Absorption spectrum sensor monitoring device

Info

Publication number: WO2021139018A1
Application number: PCT/CN2020/084141
Authority: WO
Inventors: 李智强; 陈天一; 吴钊宣; 胡立慧
Original assignee: 深圳一目科技有限公司
Priority date: 2020-01-10
Filing date: 2020-04-10
Publication date: 2021-07-15
Also published as: CN211602914U

Abstract

An absorption spectrum sensor monitoring device, comprising a quartz cuvette (1), an optical signal receiver (2), an absorption spectrum sensor (3), a main control unit (5) and a water region (6) to be detected. The absorption spectrum sensor (3) is arranged opposite to the optical signal receiver (2). Optical signals generated by the absorption spectrum sensor (3) pass through the water region (6), and are absorbed by pollutants in the water region (6). The remaining optical signals directly enter the optical signal receiver (2). The absorption spectrum sensor monitoring device is able to detect the concentration of pollutants with a high detection accuracy.

Description

Absorption spectrum sensor monitoring device

Technical field

The utility model relates to the technical field of intelligent laundry monitoring equipment, in particular to an absorption spectrum sensor monitoring device.

Background technique

On March 15, 2018, the National Standardization Administration approved and issued a newly revised national standard for washing machine products, GB/T4288-2018 "Electric Washing Machines for Household and Similar Purposes", which will be implemented on October 1, 2018. This revision mainly addresses the low accuracy of rinsing performance, wear performance test results, and the false standard of rated washing capacity. While ensuring the washing effect, the washing machine is the ultimate goal of the development of washing technology to reduce the wear on the fabric. The high washing rate and low wear rate of the washing machine are also the best washing methods pursued by consumers, and the high rinsing rate to ensure health and safety is even more important. The inevitable trend of the healthy development of washing technology in the future.

The implementation of the new national standard will promote the healthy and high-end development of my country's washing machine market. At the same time, the growth of replacement demand will also help the industry to develop towards high-end. With the substantial increase in the popularity of washing machines, the growth rate of new demand for washing machines will slow down in the future, and replacement demand will continue to drive the continuous growth of the washing machine market. The demand for renewal often places higher demands on the quality and intelligence of laundry products.

Existing washing machines control the amount of laundry detergent added according to the weight of the laundry, and do not evaluate the pollution degree of the laundry. The main reason is that it is difficult to detect solid particles in the washing process. The existing solid particle detection has infrared detection. The laundry liquid contains a large amount of foaming agent. During the washing process, with the physical stirring process, tiny bubbles and turbidity are easily generated in the water. Degree detection is very sensitive to such tiny bubbles, which can easily lead to false high data. In addition, there are many organic liquid soluble pollutants in the laundry process, but the existing infrared detection can not detect these pollutants.

Utility model content

Purpose of the utility model: In order to overcome the shortcomings in the prior art, the utility model provides an absorption spectrum sensor monitoring device that can detect the concentration of pollutants and has high detection accuracy.

Technical scheme: In order to achieve the above-mentioned purpose, the technical scheme adopted by this utility model is:

An absorption spectrum sensor monitoring device includes a quartz cuvette, an optical signal receiver, an absorption spectrum sensor, a main control unit, and a water area to be tested. The optical signal receiver and the absorption spectrum sensor are respectively connected to the main control unit. The quartz cuvette is located outside the water area to be tested, and the quartz cuvette is located on the light path of the optical signal receiver and the absorption spectrum sensor; the absorption spectrum sensor is arranged opposite to the optical signal receiver, and the absorption spectrum sensor The generated optical signal passes through the water area to be inspected, is absorbed by the pollutants in the water area to be inspected, and the remaining optical signal directly enters the optical signal receiver.

Preferably: the quartz cuvette has a ring structure, the area enclosed by the inner ring is the area to be tested for water, and the optical signal receiver and the absorption spectrum sensor are arranged around the outer ring of the quartz cuvette.

Preferably, there are two quartz cuvettes, namely the second quartz cuvette and the first quartz cuvette. The second quartz cuvette is set on the absorption spectrum sensor, and the first quartz cuvette is set on the absorption spectrum sensor. On the optical signal receiver.

Preferably: the optical signal receiver and the absorption spectrum sensor are arranged outside the water area to be inspected.

Preferably, the second quartz cuvette and the first quartz cuvette are both O-type quartz cuvettes, and the narrower side of the second quartz cuvette and the first quartz cuvette point to the central axis of the water area to be tested.

Preferably, it includes a housing and a support, the support is installed in the housing, the quartz cuvette, the optical signal receiver, the absorption spectrum sensor, and the main control unit are installed on the support, and the housing is provided with a through hole, so The through hole is connected with the water area to be tested.

Preferably: includes a cover hoop, a connecting rod, and an end cover, wherein the housing is hollow inside, and the upper end of the housing is provided with two bracket mounting holes for mounting the bracket, the bracket is hollow inside, and the upper end side is provided with a quartz cuvette mounting hole, The lower end is open; there are two brackets, respectively denoted as the left bracket and the right bracket, wherein the second quartz cuvette is installed on the quartz cuvette mounting hole of the left bracket, and the third quartz cuvette is installed on the right On the quartz cuvette mounting hole of the bracket, the quartz cuvette mounting hole of the left bracket and the quartz cuvette mounting hole of the right bracket both extend out of the outer shell, forming two protrusions to form an open type to be inspected Water area; the cover hoop is installed on the bracket, and the second quartz cuvette and the third quartz cuvette are located in the cover hoop; the connecting rod is fixedly installed in the housing, and one end of the optical signal receiver is located on the left Inside the bracket, the other end is fixedly connected to the connecting rod; one end of the absorption spectrum sensor is located in the right bracket, and the other end is fixedly connected to the connecting rod 82; the main control unit is fixedly installed in the housing, and the end cover is installed on the housing .

Preferably: comprising a first O-ring and a second O-ring, the second O-ring is arranged between the upper end of the end cover and the bracket; the first O-ring is arranged on the second quartz cuvette and the left bracket Between the quartz cuvette mounting holes of the, and the first O-ring is arranged between the quartz cuvette three and the quartz cuvette mounting hole of the right bracket.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model uses an absorption spectrum sensor to generate a light signal to irradiate the water sample, the pollutants (organic matter and suspended particles) in the water sample absorb the light signal, and the light signal receiver receives the light signal transmitted through the water. The optical signal receiver uploads the received optical signal intensity to the main control unit, so the utility model can detect the concentration of pollutants.

Description of the drawings

Figure 1 is a schematic diagram of the structure of Embodiment 1;

Figure 2 is a top view of embodiment 1;

FIG. 3 is a schematic diagram of the structure of Embodiment 2;

Figure 4 is a top view of Embodiment 2;

FIG. 5 is a schematic diagram of the structure of Embodiment 3;

Figure 6 is a top view of Embodiment 3;

FIG. 7 is a schematic diagram of the structure of Embodiment 4;

Figure 8 is a top view of Embodiment 4;

FIG. 9 is a schematic diagram of the structure of Embodiment 5;

Figure 10 is a three-dimensional structural diagram of Embodiment 5;

Figure 11 is a schematic cross-sectional view of Example 5;

FIG. 12 is a schematic diagram of the exploded structure of Embodiment 5. FIG.

Among them, 1 is a quartz cuvette, 12 is a quartz cuvette two, 13 is a quartz cuvette three, 2 is an optical signal receiver, 3 is an absorption spectrum sensor, 5 is the main control unit, and 6 is the water area to be tested , 7 is the shell, 8 is the bracket, and 9 is the sealing ring.

Detailed ways

The following is a further explanation of the present utility model with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, those skilled in the art will understand this utility model. Various equivalent modifications of the new type fall within the scope defined by the appended claims of this application.

Example 1

An absorption spectrum sensor monitoring device, as shown in Figures 1 and 2, includes a quartz cuvette 1, an optical signal receiver 2, an absorption spectrum sensor 3, a main control unit 5, a water area to be tested 6, a housing 7 and a bracket 8 The optical signal receiver 2 and the absorption spectrum sensor 3 are respectively connected to the main control unit 5, and the quartz cuvette 1 is located on the light path of the optical signal receiver 2 and the absorption spectrum sensor 3. The absorption spectrum sensor 3 and the optical signal receiver 2 are arranged oppositely. The present invention utilizes Lambert Beer's law, so the absorption spectrum sensor 3 and the optical signal receiver 2 are arranged oppositely, which is related to the absorbance. The light signal generated by the absorption spectrum sensor 3 passes through the quartz cuvette 1, and irradiates the water sample in the water area 6 to be tested. The pollutants (organic matter and suspended particles) in the water sample absorb the light signal, and the unabsorbed light signal Illuminate the optical signal receiver 2 through the quartz cuvette 1. The optical signal receiver 2 receives the unabsorbed optical signal, obtains the absorption intensity of the optical signal, and uploads the absorption intensity of the optical signal to the main control unit, which is based on The optical signal absorption intensity and the calibrated optical signal intensity obtain the attenuation value of the optical signal intensity, and then the pollutant concentration is obtained. The present invention receives the direct light of the optical signal through the optical signal receiver 2 and uploads the obtained optical signal absorption intensity For the main control unit, the quartz cuvette 1 has a ring structure, the area enclosed by the inner ring is the water to be tested area 6, and the water to be tested area 6 is a closed area with a circular through hole. The signal receiver 2 and the absorption spectrum sensor 3 are arranged around the outer ring of the quartz cuvette 1. The bracket 8 is installed in the housing 7 by screws. The quartz cuvette 1, the optical signal receiver 2, the absorption spectrum sensor 3, and the main control unit 5 are installed on the bracket 8, and the housing 7 is provided with a through hole. , The through hole 7 is in communication with the water area 6 to be inspected. The absorption spectrum sensor 3 includes an optical signal transmitter and a PCB board. The optical signal transmitter and the PCB board are respectively connected to the main control unit 5, and the optical signal transmitter and the optical signal receiver are coaxially installed. The outer shell 7 includes an upper shell, a lower shell, a back cover, and a number of sealing rings 9. The upper shell and the lower shell are connected by screws, and the back cover is fixed by a buckle. As shown in Figures 1 and 2, the absorption spectrum sensor monitoring device is divided into a water-passing part and a non-water-passing part. The water-passing part is mainly composed of a quartz cuvette 1, an optical signal receiver 2, an absorption spectrum sensor 3, and a water to be tested. The area 6 is constituted, and the non-water-passing part is mainly constituted by the main control unit 5. The absorption spectrum sensor drives the optical signal transmitter and the optical signal receiver to obtain the intensity of the optical signal through a DC voltage, and transmits data to the main control unit. The main control unit obtains the attenuation value through the difference in light intensity and obtains the concentration of pollutants. The utility model utilizes the optical signal receiver 2 to receive the optical signal absorbed by the water pollutants, which simplifies the structure and improves the detection accuracy at the same time.

The utility model has the following effects:

1. Substances that cannot be measured by measuring turbidity

The turbidity of the water is increased due to the removal of solid particulate pollutants and the discoloration of clothes during the laundry process, and there are many organic liquid soluble pollutants. The elution process of these pollutants cannot be detected by the turbidity sensor, while the absorption spectrum sensor This part of the substance has the detection ability, which can realize the sensitive detection of the degree of dirt elution in the washing process and the degree of residual laundry liquid in the rinsing process.

2. It can cover the material obtained by turbidity measurement

During the laundry process, solid particulate pollutants enter the water body with the laundry liquid, which can lead to an increase in turbidity. At the same time, it will also cause an increase in the concentration of pollutants measured by spectroscopy. Therefore, the concentration of pollutants in the washing process is measured. Changes can reflect the elution process of solid particulate pollutants to a certain extent.

3. Ignore the interference caused by the tiny bubbles generated during the agitating process of the washing machine

Laundry liquid contains a large amount of foaming agent. During the washing process, with the physical stirring process, tiny bubbles are easily generated in the water. The turbidity detection is very sensitive to such tiny bubbles, which can easily lead to false high data, while the absorption spectrum sensor detection is This phenomenon of false height can be avoided.

In summary, the utility model detects the water quality in the washing machine through the water-passing part, and the absorption spectrum sensor emits light signals to irradiate the water sample with a wavelength between 200nm and 1000nm. The optical signal receiver 2 receives the optical signal light transmitted through the water-passing part and uploads it to the main control unit.

Example 2

As shown in Figures 3 and 4, the difference between this embodiment and embodiment 1 is that there are two quartz cuvettes 1, namely quartz cuvette two 12 and quartz cuvette one 13. The water area 6 is a similar square channel, and the water area to be tested 6 is a closed area with a square through hole. The quartz cuvette two 12 and the quartz cuvette one 13 are installed outside the water area to be tested 6. The second cuvette 12 is fixedly connected to the absorption spectrum sensor 3, and the first quartz cuvette 13 is fixedly connected to the optical signal receiver 2. The two quartz cuvettes 12 and the quartz cuvette 13 are all T-shaped quartz cuvettes, and the narrower side of the

quartz cuvettes

12 and 13 points to the water area 6 to be tested. Axis.

Example 3

As shown in Figures 5 and 6, the difference between this embodiment and embodiment 1 is that there are two quartz cuvettes 1, namely quartz cuvette two 12 and quartz cuvette one 13. Cuvette two 12 and quartz cuvette one 13 are all a type quartz cuvettes. The water to be tested area 6 is an open area surrounded by quartz cuvette two 12 and quartz cuvette one 13. The second quartz cuvette 12 is installed on the absorption spectrum sensor 3, the first quartz cuvette 13 is installed on the optical signal receiver 2, and the optical signal receiver 2 and the absorption spectrum sensor 3 are installed on the support 9.

Example 4

As shown in Figures 7 and 8, the difference between this embodiment and Embodiment 3 is that the positions of the optical signal receiver 2 and the absorption spectrum sensor 3 are opposite.

Example 5

As shown in Figures 9-12, the difference between this embodiment and Embodiments 3 and 4 is that the installation position of the main control unit 5 is different.

The main control unit 5 of embodiments 3 and 4 is installed horizontally. In this embodiment, the main control unit 5 is installed vertically. In this embodiment, the structure details of the absorption spectrum sensor monitoring device are given, including the hoop 81. The first O-ring 91, the second O-ring 92, the connecting rod 82, and the end cover 71, wherein: the end cover 71 is hollow inside, and the upper end of the end cover is provided with two bracket mounting holes for installing the bracket 8. The O-ring 92 is placed between the upper end of the end cover and the bracket 8 for sealing and preventing water from entering the shell through the bracket mounting hole. The bracket 8 is hollow, the upper side is provided with a quartz cuvette mounting hole, and the lower end is open. There are two brackets 8, which are respectively denoted as the left bracket and the right bracket. The second quartz cuvette 12 is installed on the left bracket. The quartz cuvette mounting hole of the quartz cuvette, the quartz cuvette three 13 is mounted on the quartz cuvette mounting hole of the right bracket, the quartz cuvette mounting hole of the left bracket and the quartz cuvette of the right bracket are installed The holes all extend outside the housing 7 to form two protrusions to form an open water area 6 to be inspected. This open water area 6 to be inspected is more accurate than the closed water area 6 to be inspected, because The enclosed water area 6 to be inspected is generally set in a through-hole structure. Due to the effect of the through holes, the water to be inspected stays in the enclosed water area 6 for a long time and cannot be inspected in real time. The update can not accurately reflect the water quality of the water to be inspected, and the open water area 6 of the present invention can be agitated (flowed) by the water flow, and the water to be inspected in the water area 6 to be inspected can be monitored in real time. It is updated, so the water quality of the water to be tested can be reflected in real time, and the closed water area 6 to be tested will disperse light due to the through holes, which is likely to cause astigmatism, resulting in low detection accuracy. The open water area 6 to be tested does not disperse light, so the detection accuracy is high and the reliability is good. The first O-ring 91 is set on the quartz cuvette 212 and the quartz cuvette of the left bracket. Between the mounting holes, and between the quartz cuvette three 13 and the quartz cuvette mounting hole of the right bracket, and the quartz cuvette three 13 and the quartz cuvette two 12 are arranged oppositely. The cover hoop 81 is provided with a buckle, and the bracket 8 is provided with a clamping column. The cover hoop 81 is clamped on the bracket 8 through the cooperation of the buckle and the clamping column. The cuvette three 13 is located in the cover hoop 81. The quartz cuvette two 12 and the quartz cuvette three 13 are fixed on the holder 8 through the cover hoop 81, which solves the problem that the conventional cuvette is fixed by threaded nuts, which makes the structure and volume complicated. Large, water seepage problems, convenient installation, small size and no water seepage. The connecting rod 82 is fixedly installed in the housing 7 by screws. The optical signal receiver 2 enters into the left support from the lower end of the left bracket, and then the optical signal receiver 2 and the connecting rod 82 are fixed together by screws. The absorption spectrum sensor 3 enters into the right bracket from the lower end of the right bracket, and then the absorption spectrum sensor 3 and the connecting rod 82 are fixed together by screws. The main control unit 5 is fixedly installed in the housing 7, and the end cover 71 is clamped together with the housing 7. The present invention fixes the housing 7, the optical signal receiver 2, and the absorption spectrum sensor 3 together through a connecting rod 82, Form a whole, so that the housing 7, the optical signal receiver 2, the absorption spectrum sensor 3 can keep the relative positions in place, prevent the displacement between the various components from causing measurement errors, and improve the measurement accuracy of the device. The left bracket is provided with a rail one for installing the second quartz cuvette (12), and the right bracket is provided with a rail two for installing the third quartz cuvette (13). The second quartz cuvette (12) is confined in the left holder by the track one, and the quartz cuvette three (13) is confined in the right holder by the second track, thus preventing the second quartz cuvette (12), Three (13) movements of the quartz cuvette result in measurement errors and improved measurement accuracy. In addition, each component of the utility model adopts a fool-proof design to prevent installation errors.

The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made. These improvements and Retouching should also be regarded as the protection scope of this utility model.

Claims

An absorption spectrum sensor monitoring device, which is characterized in that it comprises a quartz cuvette (1), an optical signal receiver (2), an absorption spectrum sensor (3), a main control unit (5) and an open water area to be tested ( 6) The optical signal receiver (2) and the absorption spectrum sensor (3) are respectively connected to the main control unit (5), the quartz cuvette (1) is located on the absorption spectrum sensor (3), and the The quartz cuvette (1) is located on the optical signal receiver (2) and on the light path of the absorption spectrum sensor (3); the absorption spectrum sensor (3) is arranged opposite to the optical signal receiver (2).
An absorption spectrum sensor monitoring device according to claim 1, characterized in that: the quartz cuvette (1) has a ring structure, and the area enclosed by the inner ring is the water area (6) to be tested. The optical signal receiver (2) and the absorption spectrum sensor (3) are arranged around the outer ring of the quartz cuvette (1).
The monitoring device of an absorption spectrum sensor according to claim 1, characterized in that there are two quartz cuvettes (1), namely two quartz cuvettes (12) and one quartz cuvette (13). The second quartz cuvette (12) is set on the absorption spectrum sensor (3), and the first quartz cuvette (13) is set on the optical signal receiver (2).
An absorption spectrum sensor monitoring device according to claim 3, characterized in that: two quartz cuvettes (1) are arranged oppositely, and the open area enclosed by the two quartz cuvettes (1) is the water to be tested In the area (6), the optical signal receiver (2) and the absorption spectrum sensor (3) are installed on the bracket (8).
The monitoring device of an absorption spectrum sensor according to claim 3, wherein the second quartz cuvette (12) and the first quartz cuvette (13) are both T-shaped quartz cuvettes, and the quartz cuvettes are both T-shaped quartz cuvettes. The narrower side of the second cuvette (12) and the first quartz cuvette (13) points to the central axis of the water area (6) to be tested.
An absorption spectrum sensor monitoring device according to claim 3, characterized in that it comprises a housing and a support, the support (8) is installed in the housing (7), the quartz cuvette (1), the optical signal receiver The device (2), the absorption spectrum sensor (3), and the main control unit (5) are installed on the bracket, and the housing is provided with a through hole, and the through hole is connected with the water area (6) to be tested.
An absorption spectrum sensor monitoring device according to claim 6, characterized in that it comprises a cover hoop (81), a connecting rod (82), and a housing (7), wherein the housing (7) is hollow inside, and the upper end of the end cover is provided with Two bracket mounting holes for mounting the bracket (8), the bracket (8) is hollow inside, the upper side is provided with a quartz cuvette mounting hole, and the lower end is open; there are two brackets (8), which are respectively denoted as Left and right brackets, wherein the second quartz cuvette (12) is installed on the quartz cuvette mounting hole of the left bracket, and the third quartz cuvette (13) is installed on the quartz cuvette mounting hole of the right bracket Above, the quartz cuvette mounting hole of the left bracket and the quartz cuvette mounting hole of the right bracket both extend outside the housing (7), forming two protrusions to form an open water area to be tested (6) The cover hoop (81) is installed on the bracket (8), and the second quartz cuvette (12) and the third quartz cuvette (13) are located in the cover hoop (81); the connecting rod (82) ) Is fixedly installed in the housing (7), one end of the optical signal receiver (2) is located in the left bracket, and the other end is fixedly connected to the connecting rod (82); one end of the absorption spectrum sensor (3) is located in the right bracket, The other end is fixedly connected with the connecting rod 82; the main control unit (5) is fixedly installed in the housing (7), and the end cover (71) is installed on the housing (7).
An absorption spectrum sensor monitoring device according to claim 7, characterized in that it comprises a first O-ring (91), a second O-ring (92), and the second O-ring (92) is arranged on the upper end of the end cover Between the holders (8); the first O-ring (91) is arranged between the second quartz cuvette (12) and the quartz cuvette mounting hole of the left holder, and the first O-ring ( 91) It is arranged between the quartz cuvette three (13) and the quartz cuvette mounting hole of the right support.
An absorption spectrum sensor monitoring device according to claim 8, characterized in that: the left bracket is provided with a rail one for installing the second quartz cuvette (12), and the right bracket is provided with a guide rail for installing the quartz cuvette. Track two of cuvette three (13).