Water quality detector based on photoresistor

Abstract

The utility model discloses a water quality detector based on a photoresistor. The water quality detector comprises a detector box body, a laser spotlight, a transparent cubic closed container, the photoresistor, an A / DC analog-to-digital conversion and decoding circuit module and an LED nixie tube display module, the transparent cubic closed container is arranged at the upper part in the detector box body, the laser spotlight is arranged at one side of the transparent cubic closed container, and the photoresistor is arranged at the other side of the transparent cubic closed container; the laser spotlight and the photoresistor are oppositely arranged, and the laser spotlight and the photoresistor are symmetrically arranged relative to the transparent cubic closed container; the photoresistor is connected with the A / DC analog-to-digital conversion and decoding circuit module, and the A / DC analog-to-digital conversion and decoding circuit module is connected with the LED nixie tube display module; the water quality detector based on the photoresistor has the advantages of being simple in working principle, low in manufacturing material cost and small in occupied space.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing technology, and in particular to a water quality detector based on a photoresistor. Background Technology

[0002] Currently, most industrial wastewater quality testing involves sending samples to specialized water quality testing institutions. These institutions charge high fees and incur significant manpower and resource costs. Many companies discharge wastewater containing only easily precipitated substances such as suspended solids, like those used in turbocharger cleaning factories. The wastewater from these factories is primarily composed of solid impurities or oil. Existing testing equipment for this type of wastewater is expensive, and such costly and complex equipment is unnecessary. Therefore, it is necessary to propose a photoresistor-based water quality detector to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide a water quality detector based on a photoresistor, which has the advantages of simple working principle, low manufacturing material cost, and small space occupation.

[0004] This utility model provides a water quality detector based on a photoresistor, comprising: a detector housing, a laser spotlight, a transparent cubic sealed container, a photoresistor, an A / DC analog-to-digital converter and decoding circuit module, and an LED digital tube display module;

[0005] The transparent cubic sealed container is located inside the detector housing at the top. The laser spotlight is located on one side of the transparent cubic sealed container, and the photoresistor is located on the other side of the transparent cubic sealed container. The laser spotlight and the photoresistor are arranged opposite each other and symmetrically with respect to the transparent cubic sealed container. The photoresistor is connected to the A / DC analog-to-digital converter and decoding circuit module, and the A / DC analog-to-digital converter and decoding circuit module is connected to the LED digital tube display module.

[0006] Furthermore, the direction of the laser spotlight beam is perpendicular to the plane of one side wall of the transparent cubic sealed container.

[0007] Furthermore, the transparent cubic sealed container is provided with a light-proof cover on top.

[0008] Furthermore, the A / DC analog-to-digital converter and decoding circuit module is located inside the detector housing, while the LED digital tube display module is located outside the detector housing.

[0009] This invention offers the following advantages: The photoresistor-based water quality detector of this invention features a simple working principle, low material cost, and small footprint. It utilizes the photosensitive characteristics of a photoresistor and the varying light transmittance of different types of turbid water, combining the two to allow wastewater of different turbidity levels to transmit light at different volumes under the same illumination from a spotlight at the same location. The photoresistor senses these different volumes of light, generating different electrical signals, which facilitate the determination of the wastewater's turbidity level based on the differences in these signals. Therefore, the required components are relatively simple and easy to implement. It meets the water quality testing needs of most industrial wastewater with simple compositions, effectively helping enterprises save time, manpower, and resources in water quality testing. Attached Figure Description

[0010] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 The external structure of an embodiment of a water quality detector based on a photoresistor is shown; where (a) is a front view and (b) is a rear view.

[0012] Figure 2 The cross-sectional structure of an embodiment of a water quality detector based on a photoresistor is shown; where (a) is cross-section one and (b) is cross-section two.

[0013] Figure 3 The component workflow of an embodiment of a photoresistor-based water quality detector;

[0014] Figure 4 This document describes the digital conversion process for water quality values ​​in an embodiment of a photoresistor-based water quality detector.

[0015] Figure 5 The diagram shows a circuit diagram of an embodiment of a water quality detector based on a photoresistor, where (a) is a circuit diagram of a laser spotlight module and (b) is a circuit diagram of a photoresistor module.

[0016] In the diagram: 1-Laser spotlight; 2-Transparent cubic sealed container; 3-Photoresistor; 4-Light-proof cover; 5-LED digital tube display module. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be pointed out that the following detailed description is illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0019] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions has been enlarged, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0020] Please see Figures 1 to 5 This utility model provides a water quality detector based on a photoresistor, comprising: a detector housing, a laser spotlight 1, a transparent cubic sealed container 2, a photoresistor 3, a light-shielding cover 4, an A / DC analog-to-digital converter and decoding circuit module, and an LED digital tube display module 5. The A / DC analog-to-digital converter and decoding circuit module is divided into an A / DC module and a decoding circuit module.

[0021] The transparent cubic sealed container 2 is located inside the detector housing at the top. A laser spotlight 1 is positioned on one side of the transparent cubic sealed container 2, with the laser beam direction perpendicular to the plane of one side wall of the transparent cubic sealed container 2. A photoresistor 3 is positioned on the other side of the transparent cubic sealed container 2. The laser spotlight 1 and the photoresistor 3 are positioned opposite each other, symmetrically arranged with respect to the transparent cubic sealed container 2.

[0022] The transparent cubic sealed container 2 is equipped with a light-proof cover 4 on the top. The light-proof cover 4 can ensure that the photoresistor 3 is not interfered with by external light when the water quality detector based on the photoresistor detects water quality.

[0023] The A / DC analog-to-digital converter and decoder circuit module is located inside the detector housing, while the LED digital tube display module 5 is located outside the detector housing. The photoresistor 3 is connected to the A / DC analog-to-digital converter and decoder circuit module, which in turn is connected to the LED digital tube display module 5. The photoresistor receives the light signal passing through the transparent cubic container containing the mixed liquid and converts it into a corresponding electrical signal. The A / DC analog-to-digital converter and decoder circuit module then converts the electrical signal into a corresponding water quality value, which is displayed on the LED digital tube display module.

[0024] During water quality testing, a transparent cubic sealed container is filled with turbid water to be tested. The photoresistor senses the light passing through the turbid water and changes its electrical signal. The changed and stable electrical signal is transmitted to the A / DC analog-to-digital converter and decoding circuit module. This module converts the electrical signal into specific water quality physical values, which are then displayed by the LED digital tube display module. The A / DC analog-to-digital converter and decoding circuit module is implemented through pure hardware circuitry.

[0025] The differential nonlinear parameters of the A / DC analog-to-digital conversion and decoding circuit module satisfy the following expression:

[0026]

[0027] Where: Differential nonlinearity DNL is the maximum difference between all step widths of the actual and ideal conversion characteristics of the digital-to-analog converter; V OUT This is the actual output voltage value when the input is all "0"s; V LSB The input is all "0", representing the ideal output voltage value of 1 LSB; n is the input index; the integral nonlinear parameter satisfies the following relationship:

[0028]

[0029] Wherein: Integral nonlinearity INL is the maximum deviation between the actual transfer characteristic curve of the digital-to-analog converter and the ideal transfer characteristic curve after fully compensating for offset error and gain error.

[0030] Figures 3-4 This embodiment describes the workflow of each component and the conversion process of digital water quality values. A laser spotlight shines vertically onto a transparent cubic sealed container filled with wastewater. Because the transmittance of the turbid wastewater in the transparent cubic sealed container differs from that of clean water, the intensity of the light emitted directly from the wastewater will vary accordingly. A photoresistor is placed at a fixed position relative to the transparent cubic container to sense the beam of light from the spotlight opposite the container. The stronger the sensed light, the lower the resistance of the photoresistor, and the greater the current. This electrical signal is transmitted to the A / DC analog-to-digital converter and decoder module. The A / DC analog-to-digital converter and decoder module converts the electrical signal into the corresponding water quality value, which is then displayed on the LED digital tube display module.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in sequences other than those illustrated or described herein.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water quality detector based on a photoresistor, characterized in that, include: Detector housing, laser spotlight (1), transparent cubic sealed container (2), photoresistor (3), A / DC analog-to-digital converter and decoding circuit module, LED digital tube display module (5); The transparent cubic sealed container (2) is located inside the detector housing and above. The laser spotlight (1) is located on one side of the transparent cubic sealed container (2), and the photoresistor (3) is located on the other side of the transparent cubic sealed container (2). The laser spotlight (1) and the photoresistor (3) are arranged opposite to each other and are symmetrically arranged with respect to the transparent cubic sealed container (2). The photoresistor (3) is connected to the A / DC analog-to-digital converter and decoding circuit module, and the A / DC analog-to-digital converter and decoding circuit module is connected to the LED digital tube display module (5).

2. The water quality detector based on a photoresistor as described in claim 1, characterized in that, The laser spotlight (1) is perpendicular to the plane of one side wall of the transparent cubic sealed container (2).

3. The water quality detector based on a photoresistor as described in claim 1, characterized in that, The transparent cubic sealed container (2) is equipped with a light-proof cover (4) on top.

4. The water quality detector based on a photoresistor as described in claim 1, characterized in that, The A / DC analog-to-digital converter and decoding circuit module is located inside the detector housing, while the LED digital tube display module (5) is located outside the detector housing.

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