A turbidity detection device

Abstract

The utility model discloses a turbidity detection device, comprising a turbidity sensor, a water tank and a reflective medium plate, wherein the turbidity sensor is fitted on an outer side wall of the water tank, and the reflective medium plate is positioned on another outer side wall opposite to the turbidity sensor; the turbidity sensor is arranged on the outer side wall of the water tank, and there is no need to consider that suspended particles adhere to the surface of the turbidity sensor after being used for a period of time, thereby affecting the sending and receiving paths of a transmitting lamp and a receiving lamp, thereby affecting the detection accuracy of the turbidity sensor; at the same time, the turbidity sensor is arranged on the outer side wall of the water tank, isolated from the liquid to be measured, and there is no need to consider the wiring and waterproofing of the turbidity sensor in product design.

Description

Technical Field

[0001] The utility model belongs to the technical field of turbidity detection, and in particular relates to a turbidity detection device. Background Art

[0002] A sweeping robot is a home appliance that uses artificial intelligence technology to automatically clean the floor in a room. Initially, this type of product was mainly sold in the European and American markets. However, with the improvement of China's economic level and the acceleration of the pace of life, more and more young people lack time to clean their rooms due to busy work, which has led to a rapid increase in the domestic demand for sweeping robots.

[0003] With the technological upgrade and innovation in the field of sweeping robots, the automatic water supply and discharge function has also been applied to the field of sweeping robots. It means that the sweeping robot can automatically take in clean water and automatically discharge sewage like a washing machine. A sweeping robot with automatic water supply and discharge function can ensure a continuous water source and automatically discharge sewage, avoiding the problem of poor cleaning effect caused by too much sewage. The turbidity of water is one of the important indicators to measure the quality of water. The turbidity sensor can calculate the turbidity of the water sample by the amount of light penetration when the emission source passes through a certain amount of water sample. The amount of light penetration depends on the amount of suspended particles in the water sample. When the amount of suspended particles increases, the light penetrating the water sample decreases accordingly. When the turbidity sensor detects that the suspended particles in the water sample reach the sewage discharge standard, the sweeping robot automatically discharges the sewage to the designated area, avoiding the waste of water resources.

[0004] The existing turbidity detection device sets the turbidity sensor in the water tank. After long-term use, the suspended particles in the water will adhere to the turbidity sensor, which needs to be cleaned at regular intervals, otherwise it will affect the detection accuracy of the turbidity sensor. Utility Model Content

[0005] In order to solve the problem that turbidity attached to the turbidity sensor needs to be cleared at regular intervals, the utility model provides a turbidity detection device, and the technical solution is as follows:

[0006] A turbidity detection device comprises a turbidity sensor, a water tank and a reflective medium plate. The turbidity sensor is fitted on an outer side wall of the water tank, and the reflective medium plate is positioned on another outer side wall opposite to the turbidity sensor.

[0007] Preferably, the turbidity sensor comprises a base, a front end surface of the base is provided with an emitting lamp and a receiving lamp in parallel up and down, and a rear end surface of the base is provided with a socket, which is respectively connected to the emitting lamp and the receiving lamp circuit.

[0008] Preferably, the emitting lamp emits visible light or infrared light.

[0009] Preferably, the emission lamp emits green light, and the wavelength of the green light is 490 nanometers to 560 nanometers.

[0010] Preferably, a rectangular protective cover is provided around the front end surface of the base, and the transmitting lamp and the receiving lamp are positioned in the rectangular protective cover.

[0011] Preferably, the turbidity sensor further comprises a transparent cover shell, which covers the rectangular protective cover; and a front end surface of the transparent cover shell is tightly fitted on the outer side wall of the water tank.

[0012] By adopting the above technical solution, the base fits tightly against the rectangular protective cover to prevent dust or impurities from entering the turbidity sensor and affecting the detection accuracy of the transmitting lamp and the receiving lamp; the front end surface of the transparent cover fits tightly against the outer wall of the water tank, that is, the turbidity sensor is arranged on the outer wall of the water tank, and there is no need to consider the problem of waterproof leakage in the design, and there is no need to remove the turbidity attached to the turbidity sensor at regular intervals.

[0013] Preferably, a water-isolating groove is provided on the water tank, and the reflective medium plate is vertically arranged in the water-isolating groove.

[0014] By adopting the above technical solution, the water-isolating groove has the same shape as the side of the water tank, and a reflective medium plate can be placed in the water-isolating groove as a fully covered reflective surface.

[0015] Preferably, the reflective medium plate is a white plate, a green plate or a black plate, and the reflectivity of the reflective medium plate is greater than 50%.

[0016] By adopting the above technical solution, when the emitted light of the emitting lamp is visible light, the reflective medium plate is a white plate or a green plate, and the reflective medium plate absorbs light in other wavelength ranges, and the visible light is reflected back to the receiving lamp; when the emitted light of the emitting lamp is infrared light, the reflective medium plate is a black plate, and the reflective medium plate absorbs light in other wavelength ranges, and the infrared light is reflected back to the receiving lamp.

[0017] Preferably, the transmitting lamp and the receiving lamp are provided with lampshades, and the lampshades are made of colorless transparent material or black material.

[0018] By adopting the above technical solution, when the emitted light of the emitting lamp is visible light, the lampshades of the emitting lamp and the receiving lamp are made of smooth, colorless and transparent material; when the emitted light of the emitting lamp is infrared, the lampshades of the emitting lamp and the receiving lamp are made of black opaque material.

[0019] Preferably, the water tank is made of a smooth, colorless and transparent material.

[0020] By adopting the above technical solution, the smooth, colorless and transparent material has the characteristics of low absorption rate, and the light emitted by the transmitting lamp can be emitted with low loss, thereby reducing the loss of light and improving the detection accuracy of the turbidity sensor.

[0021] The beneficial effects of the utility model are:

[0022] 1. The turbidity sensor is set on the outer wall of the water tank. There is no need to consider that after a period of use, suspended particles will adhere to the surface of the turbidity sensor, affecting the sending and receiving paths of the transmitting and receiving lights, thereby affecting the detection accuracy of the turbidity sensor.

[0023] 2. The turbidity sensor is set on the outer wall of the water tank and isolated from the liquid to be measured. There is no need to consider the wiring and waterproof leakage of the turbidity sensor in product design. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a turbidity detection device;

[0025] Figure 2 This is a schematic diagram of the front structure of the turbidity sensor when the emitting light is green;

[0026] Figure 3 This is a schematic diagram of the front structure of the turbidity sensor when the emitting light is infrared;

[0027] Figure 4 It is a schematic diagram of the side structure of the turbidity sensor;

[0028] Figure 5 This is the absorption spectrum of water.

[0029] Explanation of the reference numerals: 1. Turbidity sensor; 2. Water tank; 3. Water-isolating groove; 4. Reflective medium plate; 5. Base; 6. Rectangular protective cover; 7. Transmitting lamp; 8. Receiving lamp; 9. Socket; 10 Transparent cover; 11. Lampshade. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution in the present application, the technical solution of the present utility model will be described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0031] Example 1

[0032] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The turbidity detection device involved in this embodiment includes a turbidity sensor 1, a water tank 2 and a reflective medium plate 4. The turbidity sensor 1 is fitted on an outer wall of the water tank 2, and the reflective medium plate 4 is positioned on the other outer wall opposite to the turbidity sensor 1.

[0033] In this embodiment, the turbidity sensor 1 includes a base 5, and a transmitting lamp 7 and a receiving lamp 8 are arranged side by side on the front end surface of the base 5. When the light emitted by the transmitting lamp 7 passes through a certain amount of water, the amount of light transmitted depends on the turbidity of the water. The dirtier the water, the less light is transmitted. The rear end surface of the base 5 is provided with a socket 9, and the socket 9 is respectively connected to the transmitting lamp 7 and the receiving lamp 8 circuits.

[0034] In this embodiment, the turbidity sensor 1 is a reflective photoelectric sensor, and is equipped with a transmitting lamp 7 and a receiving lamp 8, which is more convenient and flexible in application.

[0035] The turbidity sensor 1 further comprises a transparent cover 10 , which covers the rectangular protective cover 6 ; the front end surface of the transparent cover 10 is tightly fitted on the outer side wall of the water tank 2 .

[0036] A water-isolating groove 3 is provided on the water tank 2, and a reflective medium plate 4 is vertically arranged in the water-isolating groove 3, so as to prevent the reflective medium plate 4 from being immersed in the water body for a long time, and turbidity is attached to the reflective medium plate 4, causing the original color of the reflective medium plate 4 to change and affect the measurement accuracy of the turbidity sensor 1.

[0037] The water tank 2 is made of a smooth, colorless and transparent material. The smooth surface can reduce the generation of scattered light, so that the reflected light is not affected by irrelevant factors; at the same time, the colorless and transparent characteristics can avoid the influence of color on the detection results, thereby improving the measurement accuracy of the turbidity sensor 1.

[0038] In this embodiment, the overall color of the reflective medium plate 4 is green or white. The white reflective plate and the green reflective plate have low absorption rates for light with a wavelength of 490 nanometers to 560 nanometers, and can reflect light in this wavelength band back to the receiving lamp 8, thereby improving the measurement accuracy of the turbidity sensor 1.

[0039] The reflective medium plate 4 is a white plate with a reflectivity greater than 50%, and can effectively reflect green light with a wavelength of 490 nanometers to 560 nanometers with a stable reflectivity.

[0040] A rectangular protective cover 6 is provided around the front end surface of the base 5, and a transmitting lamp 7 and a receiving lamp 8 are positioned inside the rectangular protective cover 6. The rectangular protective cover 6 fixes the transmitting lamp 7 and the receiving lamp 8, and a transparent cover shell 10 covers them to prevent dust or other impurities from entering the interior of the turbidity sensor 1 and affecting the measurement accuracy of the turbidity sensor 1.

[0041] In this embodiment, the emitting lamp 7 emits visible light; according to Figure 5: The absorption spectrum of water, which shows the degree to which light waves of different wavelengths are absorbed when passing through water; for light waves of different wavelengths, the absorption intensity will be very different, among which light waves between 300 nanometers and 900 nanometers can pass through water, so light waves within this wavelength range are applicable to this embodiment;

[0042] In this embodiment, the transmitting lamp 7 emits green light, and the receiving lamp 8 needs to receive the light from the transmitting lamp 7. When light propagates in water, the wavelength of light with the lowest loss is located in the blue-green light region of the visible spectrum, that is, approximately between 400 nanometers and 560 nanometers. This part of light has the smallest propagation loss in water, which can make the signal transmitted farther; compared with green light, the wavelength range of blue light is relatively narrow; green light has a relatively wide wavelength range, and the propagation loss of green light in water is the smallest, which can make the signal transmitted farther. At the same time, the scattering loss of green light is relatively small, and the receiving lamp 8 can receive considerable green light. Green light is an ideal light source for the transmitting lamp 7 to emit light.

[0043] In this embodiment, the wavelength of the green light emitted by the emitting lamp 7 is 490 nanometers to 560 nanometers. The light waves in this wavelength range have the highest sensitivity and the least interference, and are the preferred window band for the emitting lamp 7 of this embodiment.

[0044] In this embodiment, the transmitting lamp 7 and the receiving lamp 8 are provided with a lampshade 11, and the lampshade 11 is made of a smooth, colorless and transparent material.

[0045] The working principle of the utility model is as follows: the emitting lamp 7 in the turbidity sensor 1 emits light of a specific wavelength, which passes through the water body and reaches the reflective medium plate 4 and then reflects, and is finally received by the receiving lamp 8. The suspended particles in the sewage will scatter the light emitted by the emitting lamp 7. The turbidity sensor 1 will measure the amount of light penetrating the water body, that is, judge the turbidity of the water body according to the amount of light reflected back and convert it into an electrical signal, thereby calculating the turbidity in the sewage; if the water body is relatively clear, the intensity of the reflected light will be relatively strong, and the converted electrical signal will also be relatively strong; on the contrary, if the water body is relatively turbid, the intensity of the reflected light will be relatively weak, and the converted electrical signal will also be relatively weak; this process is linearized and then outputs the final turbidity value; the turbidity value transmits information to the input pin of the external controller through the output pin on the socket 9; when the turbidity value reaches the set value, the controller issues an instruction to control the turbidity detection device to discharge the sewage.

[0046] Example 2

[0047] See also Figure 1 , Figure 3 , Figure 4 and Figure 5In this embodiment, a turbidity sensor 1, a water tank 2 and a reflective medium plate 4 are included. The turbidity sensor 1 is fitted on an outer side wall of the water tank 2, and the reflective medium plate 4 is positioned on the other outer side wall opposite to the turbidity sensor 1.

[0048] The turbidity sensor 1 includes a base 5, and a transmitting lamp 7 and a receiving lamp 8 are arranged side by side on the front end surface of the base 5. When the light emitted by the transmitting lamp 7 passes through a certain amount of water, the amount of light transmitted depends on the turbidity of the water. The dirtier the water, the less light is transmitted. The rear end surface of the base 5 is provided with a socket 9, and the socket 9 is respectively connected to the transmitting lamp 7 and the receiving lamp 8 circuits.

[0049] In this embodiment, the transmitting lamp 7 emits infrared rays, which penetrate the suspended particles in the water and reach the reflective medium plate 4. The reflective medium plate 4 reflects the infrared rays emitted by the transmitting lamp 7, and the reflected infrared rays are finally received by the receiving lamp 8. The scattering and absorption characteristics of infrared light can more accurately determine the concentration and size of suspended particles in the water.

[0050] In this embodiment, the lampshades 11 of the transmitting lamp 7 and the receiving lamp 8 are made of black opaque material to reduce the interference of ambient light on the turbidity sensor 1 .

[0051] In this embodiment, the overall color of the reflective medium plate 4 is black. The black reflective plate can efficiently reflect infrared rays back to the receiving lamp 8 , thereby improving the measurement accuracy of the turbidity sensor 1 .

[0052] The rest of the embodiment and the working principle are the same as those of embodiment 1.

Claims

1. A turbidity detection device, comprising a turbidity sensor (1), a water tank (2) and a reflective medium plate (4), characterized in that: The turbidity sensor (1) is arranged on an outer side wall of the water tank (2), and the reflective medium plate (4) is positioned on the other outer side wall opposite to the turbidity sensor (1).

2. A turbidity detection device according to claim 1, characterized in that: The turbidity sensor (1) comprises a base (5), a front end surface of the base (5) having an emitting lamp (7) and a receiving lamp (8) arranged in parallel up and down, and a rear end surface of the base (5) having a socket (9), the socket (9) being respectively connected to the emitting lamp (7) and the receiving lamp (8) circuits.

3. A turbidity detection device according to claim 2, characterized in that: The emitting lamp (7) emits visible light or infrared light.

4. A turbidity detection device according to claim 3, characterized in that: The emission lamp (7) emits green light, and the wavelength of the green light is 490 nanometers to 560 nanometers.

5. A turbidity detection device according to claim 4, characterized in that: A rectangular protective cover (6) is arranged around the front end surface of the base (5), and a transmitting lamp (7) and a receiving lamp (8) are positioned in the rectangular protective cover (6).

6. A turbidity detection device according to claim 5, characterized in that: The turbidity sensor (1) also includes a transparent cover shell (10), which covers the rectangular protective cover (6); the front end surface of the transparent cover shell (10) is tightly fitted on the outer side wall of the water tank (2).

7. A turbidity detection device according to claim 6, characterized in that: A water-isolating groove (3) is provided on the water tank (2), and a reflective medium plate (4) is vertically arranged in the water-isolating groove (3).

8. A turbidity detection device according to claim 7, characterized in that: The reflective medium plate (4) is a white plate, a green plate or a black plate, and the reflectivity of the reflective medium plate (4) is greater than 50%.

9. A turbidity detection device according to claim 7 or 8, characterized in that: The transmitting lamp (7) and the receiving lamp (8) are provided with a lampshade (11), and the lampshade (11) is made of a colorless transparent material or a black opaque material.

10. A turbidity detection device according to claim 9, characterized in that: The water tank (2) is made of a smooth, colorless and transparent material.

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