Turbidity detection sensor with high detection precision

Abstract

The utility model belongs to the technical field of water quality detection, and particularly relates to a turbidity detection sensor with high detection precision. The utility model provides a turbidity detection sensor with high detection precision, and aims to solve the problem of low detection precision of a turbidity meter in the prior art. A turbidity detection sensor with high detection precision comprises a shell, a detection assembly is arranged in the shell, the shell is provided with a detection cavity, the detection cavity is recessed into the shell, the detection cavity comprises a first side wall and a second side wall, and the first side wall is not parallel to the second side wall; by arranging the light blocking device, the light blocking device can block part of light rays emitted by the light source, so that the light rays emitted by the light source cannot be directly received by the receiver, and the light rays received by the receiver are all light rays emitted by the detection cavity, so that the detection precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water quality detection technical field, specifically related to a turbidity detection sensor with high detection precision. BACKGROUND

[0002] Water turbidity is an important index of water quality evaluation in monitoring, and water turbidity meter is an instrument for measuring the turbidity of water sample. In the prior art, people generally use infrared light emitting diode, laser and other advanced light sources. The light emitted by the light source is reflected by the impurities in the water and is received by the light receiver. Then, the light received by the light receiver is analyzed, and the turbidity parameter can be obtained.

[0003] The turbidity meter of the prior art has a complex structure, and the arrangement of the light source and the light receiver is unreasonable. The light receiver needs to be configured with a light guide column to receive light. Therefore, the turbidity meter of the prior art has a complex structure and high manufacturing cost. In addition, the turbidity meter of the prior art also has the problem of low detection precision because the light emitted by the light source is directly received by the receiver. INVENTION CONTENTS

[0004] The utility model provides a turbidity detection sensor with high detection precision, which aims to solve the problem of low detection precision of the turbidity meter in the prior art.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A turbidity detection sensor with high detection precision, comprising a shell, a detection assembly is arranged in the shell, a detection cavity is arranged on the shell, the detection cavity is recessed in the shell, the detection cavity comprises a first side wall and a second side wall, and the first side wall is not parallel to the second side wall.

[0007] The detection assembly comprises a light source for inputting light into the detection cavity and a receiver for receiving the reflected light in the detection cavity, and the light output direction of the light source is perpendicular to the direction of the receiver receiving light.

[0008] The detection cavity is also provided with a light blocker for preventing the light emitted by the light source from being directly received by the receiver.

[0009] Further improved scheme: the light blocker is located on the side of the light source close to the receiver, and the light blocker is arranged on the shell.

[0010] Based on the above technical scheme: the light blocker can effectively block the light, so that the light emitted by the light source is blocked on the side close to the receiver, and the light emitted by the light source is not easy to be directly received by the receiver, thereby improving the accuracy of the receiver receiving light.

[0011] A further improved solution: the light blocker blocks 1 / 3 to 1 / 2 of the light output by the light source.

[0012] Based on the above technical solution: the light emitted by the light source will not be blocked too much by the light blocker, so that more light emitted by the light source enters the detection cavity. The more light enters the detection cavity, the more light the receiver receives, which is conducive to improving detection accuracy.

[0013] A further improved solution: the light blocker blocks 1 / 3 of the light output by the light source.

[0014] A further improved solution: a light output port is provided on the first side wall, the light emitted by the light source is input into the detection cavity through the light output port, and the light blocker covers a portion of the light output port.

[0015] Based on the above technical solution: by providing a light output port, the light source can be arranged in the housing, and the housing has the function of protecting the light source, so the light source is not easily damaged.

[0016] A further improved solution: a light input port is provided on the second side wall, and a portion of the light reflected from the detection cavity is received by the receiver through the light input port.

[0017] Based on the above technical solution: by providing a light input port, the receiver can be arranged in the housing, and the housing has the function of protecting the receiver, so the receiver is not easily damaged.

[0018] A further improved solution: the first side wall is perpendicular to the second side wall, and the light blocker is arranged between the first side wall and the second side wall.

[0019] Based on the above technical solution: the receiver is arranged vertically to the light source, so that more light in the detection cavity can be reflected to the receiver, and the receiver can receive more light.

[0020] A further improved solution: the cross-section of the light blocker is rectangular.

[0021] Based on the above technical solution: the cross-section of the light blocker is rectangular, the light blocker is not easily deformed and has high strength.

[0022] A further improved solution: both ends of the light blocker are respectively provided with arc chamfers for achieving a smooth transition between the light blocker and the second side wall.

[0023] Based on the above technical solution: the setting of the arc chamfer enables smooth filtering between the light blocker and the second side wall, and impurities are not easily accumulated in the detection cavity.

[0024] A further improved solution: the light blocker and the housing are an integrated structure.

[0025] Based on the above technical scheme: the light barrier has high connection strength with the shell.

[0026] The utility model discloses the beneficial effect that:

[0027] By making the light output direction of the light source and the direction of the light received by the receiver vertical, the turbidimeter does not need to set the light guide column when working, and the light emitted by the light source is directly received by the receiver after reflection, which simplifies the structure of the sensor and reduces the manufacturing cost of the sensor.

[0028] By setting the light barrier, the light barrier can block part of the light emitted by the light source, so that the light emitted by the light source is not directly received by the receiver, and the light received by the receiver is all the light emitted by the detection cavity, thereby improving the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary technical user in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0030] Fig. 1 It is a schematic diagram of the turbidity detection sensor with high detection accuracy of the utility model.

[0031] Fig. 2 It is a local schematic diagram of the first direction of the upper end of the turbidity detection sensor with high detection accuracy of the utility model.

[0032] Explanation of reference numerals in the drawings:

[0033] 1-shell;11-detection cavity;12-first side wall;121-light output port;13-second side wall;131-light input port;2-light barrier;21-circular arc chamfer. DETAILED DESCRIPTION

[0034] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model. Based on the embodiments of the utility model, all other embodiments obtained by the technical user in the art without creative labor belong to the protection scope of the utility model.

[0035] Embodiment one:

[0036] Reference Figs. 1-2A turbidity detection sensor with high detection accuracy includes a housing 1, a detection component is disposed in the housing 1, a detection cavity 11 is provided on the housing 1, the detection cavity 11 is recessed in the housing 1, the detection cavity 11 includes a first side wall 12 and a second side wall 13, and the first side wall 12 is not parallel to the second side wall 13;

[0037] The detection assembly includes a light source for inputting light into the detection cavity 11 and a receiver for receiving light reflected from the detection cavity 11. The light output direction of the light source is perpendicular to the direction in which the receiver receives light.

[0038] A light blocker 2 is also provided in the detection cavity 11 to prevent the light emitted by the light source from being directly received by the receiver.

[0039] Specifically: The turbidity detection sensor uses the 90-degree reflection method for detection, and the detection principle is based on the existing technology. The specific structure and working principle of the detection component are based on the existing technology.

[0040] The light source can be an element that can emit light, such as an infrared light emitting diode, a laser, etc. The light source is powered by a power supply, and the power supply can be installed in the housing 1.

[0041] During the detection process, the turbidity detection sensor is placed in the liquid to be detected, or at least the detection cavity 11 is immersed in the liquid to be detected. The light source is turned on, and the light emitted by the light source enters the detection cavity 11. The light entering the detection cavity 11 is reflected by impurities in the water and enters the receiver. The turbidity of the liquid to be detected can be determined by analyzing the parameters of the light entering the receiver.

[0042] The light emitted by the light source may produce a certain amount of scattering. That is, a portion of the light emitted by the light source may directly illuminate the receiver. Because this portion of light is not reflected by impurities in the water, when a portion of the light emitted by the light source is directly received by the receiver, there is an error in the light received by the receiver, and this error will reduce the detection accuracy. By setting up light blocker 2, light blocker 2 can block a portion of the light from the light source, so that the light emitted by the light source is reflected by impurities in the liquid before entering the receiver. Therefore, by setting up light blocker 2, light emitted by the light source can be prevented from directly entering the receiver.

[0043] Example 2:

[0044] See Fig. 2 In order to make the light blocker 2 have better performance and prevent the light blocker 2 from blocking too much light, in the above embodiment: the light blocker 2 is located on the side of the light source close to the receiver, and the light blocker 2 is arranged on the housing 1.

[0045] Specifically, the light barrier 2 blocks 1 / 3 to 1 / 2 of the light emitted by the light source. A portion of the light barrier 2 extends into the light beam formed by the light source, and the distance by which the light barrier 2 extends into the light beam is 1 / 3 to 1 / 2 of the diameter of the light beam formed by the light source.

[0046] The distance by which the light barrier 2 extends into the light beam should not be greater than 1 / 2 of the diameter of the light beam. If the distance by which the light barrier 2 extends into the light beam is greater than 1 / 2 of the diameter of the light beam, most of the light emitted by the light source will be blocked by the light barrier 2, and the amount of light entering the detection cavity 11 will decrease. If the amount of light entering the detection cavity 11 decreases to a certain extent, the detection accuracy of the turbidity sensor will be affected. Therefore, the distance by which the light barrier 2 extends into the light beam should not be greater than 1 / 2 of the diameter of the light beam.

[0047] Specifically, the light barrier 2 blocks 1 / 3 of the light emitted by the light source. The distance by which the light barrier 2 extends into the light beam is equal to 1 / 3 of the diameter of the light beam. Some of the light emitted by the light source can directly enter the receiver, and the light received by the receiver is all reflected light from the detection cavity 11.

[0048] Embodiment Three

[0049] Referring to Fig. 2 In order to make the structure of the shell 1 reasonable and make the light source and the receiver easy to maintain, on the basis of the above embodiments, the first side wall 12 is provided with a light output port 121, the light emitted by the light source enters the detection cavity 11 through the light output port 121, and the light barrier 2 covers a portion of the light output port 121.

[0050] The second side wall 13 is provided with a light input port 131, and a portion of the light reflected by the detection cavity 11 is received by the receiver through the light input port 131.

[0051] The second side wall 13 can be perpendicular to the horizontal plane, so that impurities are not easy to accumulate on the second side wall 13, and the impurities accumulated on the second side wall 13 do not block the light. The light reflected by the detection cavity 11 all enters the receiver.

[0052] The first side wall 12 is perpendicular to the second side wall 13, and the light barrier 2 is arranged between the first side wall 12 and the second side wall 13. A transparent plate for protecting the light source can be arranged on the first side wall 12, and the transparent plate can be bonded to the first side wall 12. The plate can cover the light output port 121.

[0053] Embodiment Four

[0054] Referring to Fig. 2In order to make the light barrier 2 easily set on the shell 1, on the basis of the above embodiment: the cross-sectional shape of the light barrier 2 is rectangular. The cross-sectional shape of the light barrier 2 can also be other shapes, for example, can be semicircular or polygonal, etc.

[0055] The light barrier 2 is provided with a circular arc chamfer 21 at both ends, which makes the light barrier 2 and the second side wall 13 smoothly transition. By setting the circular arc chamfer 21, there is no dead angle between the light barrier 2 and the second side wall 13, and impurities are not easily accumulated in the detection cavity 11.

[0056] The light barrier 2 and the shell 1 are of an integral structure.

[0057] The light barrier 2 can also be fixed to the shell 1 in other ways, for example, the light barrier 2 can be fixed to the shell 1 by screws, or the light barrier 2 can be bonded to the shell 1.

[0058] The shell 1 can be a cylinder, and the shell 1 extends away from the first side wall 12 and the second side wall 13, and electronic elements such as power supplies can be fixed in the shell 1, for example, electronic elements such as power supplies can be installed in the shell 1 by screws.

[0059] The end of the shell 1 away from the first side wall 12 can be provided with a data interface, which can be in communication connection with the receiver to output the light or data received by the receiver.

[0060] The use method will be further introduced below:

[0061] Referring to Figs. 1-2 The turbidity detection sensor is placed in the liquid, and the detection cavity 11 is completely immersed in the liquid;

[0062] After the liquid enters the detection cavity 11, the light source is turned on, the light source emits light, the light emitted by the light source forms a light beam, and the side of the light beam close to the receiver is blocked by the light barrier 2 and does not enter the detection cavity 11. Because the light barrier 2 blocks the light of the side of the light beam close to the receiver, the light emitted by the light source will not directly enter the receiver;

[0063] The remaining light of the light beam enters the detection cavity 11, and the light entering the detection cavity 11 is reflected by the impurities in the detection cavity 11 and then enters the receiver and is received by the receiver;

[0064] The light data received by the receiver can be analyzed to obtain the turbidity of the liquid.

[0065] The present invention is not limited to the above optional implementation methods. Under the premise of not conflicting with each other, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the scope of protection of the present invention.

Claims

1. A turbidity detection sensor with high detection accuracy, characterized by: The invention comprises a housing, a detection assembly is disposed in the housing, a detection cavity is disposed on the housing, the detection cavity is recessed into the housing, the detection cavity comprises a first side wall and a second side wall, and the first side wall is not parallel to the second side wall; The detection assembly includes a light source for inputting light into the detection cavity and a receiver for receiving light reflected from the detection cavity, wherein the light output direction of the light source is perpendicular to the light receiving direction of the receiver; A light blocker is also provided in the detection cavity to prevent the light emitted by the light source from being directly received by the receiver.

2. The turbidity detection sensor with high detection accuracy according to claim 1, characterized in that: The light blocker is located on a side of the light source close to the receiver, and the light blocker is arranged on the housing.

3. The turbidity detection sensor with high detection accuracy according to claim 2, characterized in that: The light blocker blocks 1 / 3 to 1 / 2 of the light output by the light source.

4. The turbidity detection sensor with high detection accuracy according to claim 3, characterized in that: The light blocker blocks 1 / 3 of the light output by the light source.

5. The turbidity detection sensor with high detection accuracy according to claim 2, characterized in that: A light output port is provided on the first side wall, and the light emitted by the light source is input into the detection cavity through the light output port, and the light blocker covers a portion of the light output port.

6. The turbidity detection sensor with high detection accuracy according to claim 2, characterized in that: The second side wall is provided with a light input port, and a portion of the light reflected from the detection cavity is received by the receiver through the light input port.

7. The turbidity detection sensor with high detection accuracy according to claim 2, characterized in that: The first side wall is perpendicular to the second side wall, and the light blocker is disposed between the first side wall and the second side wall.

8. The turbidity detection sensor with high detection accuracy according to claim 1, characterized in that: The cross-section of the light barrier is rectangular.

9. The turbidity detection sensor with high detection accuracy according to claim 8, characterized in that: Both ends of the light blocker are respectively provided with arc chamfers for achieving a smooth transition between the light blocker and the second side wall.

10. The turbidity detection sensor with high detection accuracy according to claim 9, characterized in that: The light blocker and the housing are an integrated structure.

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