Water quality detector

Abstract

The utility model relates to the technical field of water quality detection, in particular to a water quality detector which comprises a hollow shell with an opening at one end, an electrical unit, a detection pool and a detection unit, the detection pool is positioned at one end of the shell with the opening; the detection unit is arranged in the detection pool, the emission and detection integrated module is arranged in the protection shell, the emission and detection integrated module is electrically connected with the circuit board, the emission and detection integrated module comprises a light emission device and a light detection device which are connected in series, the light emission device is used for emitting ultraviolet light, and the light reflection part is used for reflecting the ultraviolet light; and the light detection device is used for detecting the reflected ultraviolet light. The water quality detector effectively prevents the light emitting device and the light detecting device from zero drift, can truly reflect the water quality condition, and solves the problems that elements in an existing water quality detection device have zero drift, the data accuracy and reliability are low, the real condition of water quality cannot be accurately reflected, and the detection cost is low. And the water quality detection device is inconvenient to use due to large volume.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality detection technical field, especially relate to a water quality detector. BACKGROUND

[0002] Water quality detection has been widely used in all aspects of life, and become indispensable to ensure water quality safety, assess water conditions and promote environmental protection. Organic matter content is a common and key water quality index in water quality assessment.

[0003] According to Beer-Lambert law, absorbance is proportional to the concentration of light absorbing substance and optical path, based on this law, ultraviolet transmittance can be measured, then absorbance can be calculated, and the concentration of light absorbing substance can be calculated, and the concentration of light absorbing substance actually represents the concentration of organic matter, and the value can be used to evaluate the pollution degree of organic matter in the water. According to the above principle, the existing water quality detection device is provided with an ultraviolet emitter and an ultraviolet detector at two opposite positions of the sample pool, the ultraviolet light emitted by the ultraviolet emitter passes through the water sample, is received by the ultraviolet detector, the ultraviolet transmittance is measured and calculated, and the pollution of organic matter in the water can be further analyzed and determined.

[0004] However, due to the different positions of the two elements of the water quality detection device, the different circuits are connected, so that the current and working temperature of the two elements are different in the working state, resulting in zero point shift phenomenon of the two elements, measurement error, low accuracy and reliability of the data, and the real situation of water quality cannot be accurately reflected. In addition, the greater the absorbance, the higher the measurement accuracy, in the case that the absorbance is proportional to the optical path, the greater the optical path, that is, the distance between the ultraviolet emitter and the ultraviolet detector, the greater the absorbance, and the distance between the ultraviolet emitter and the ultraviolet detector represents the length of the sample pool, which means that in order to obtain accurate measurement results, the length of the sample pool should be large enough, but this leads to the increase of the volume of the water quality detection device, causing the problem of inconvenience. UTILITY MODEL CONTENTS

[0005] The utility model discloses a water quality detector, effectively prevent the light emitting device and light detecting device from happening zero point shift phenomenon, can truly reflect water quality condition, have the advantages such as small, measurement accuracy is high, compact structure, convenient to carry and convenient to use, solve the element in the water quality detection device of prior art and the phenomenon of zero point shift, data accuracy and reliability are low, the real situation of water quality cannot be accurately reflected, and the problem that the volume of water quality detection device is large and causes inconvenience.

[0006] In order to achieve the above object, the utility model provides a water quality detector, including inside hollow and one end is open shell, electric unit, detection pool and detection unit,

[0007] The electric unit is arranged in the shell, and the electric unit comprises a circuit board;

[0008] The detection pool is located at one end of the shell provided with the opening, and a partition is arranged at one end of the detection pool close to the shell to separate the shell and the detection pool into two independent spaces; a detection opening is formed at one end of the detection pool away from the shell to fill the water sample to be detected into the inside of the detection pool.

[0009] The detection unit is arranged in the detection pool, and the detection unit comprises a protective shell, a transmitting and detecting integrated module and a light reflecting piece, the protective shell and the light reflecting piece are oppositely arranged at two sides of the length direction of the detection pool and are connected with the pool wall of the detection pool respectively; the transmitting and detecting integrated module is arranged in the protective shell, and the transmitting and detecting integrated module is electrically connected with the circuit board; the transmitting and detecting integrated module comprises a light emitting device and a light detecting device connected in series, the light emitting device is used for emitting ultraviolet light, the light reflecting piece is used for reflecting the ultraviolet light, and the light detecting device is used for detecting the reflected ultraviolet light.

[0010] Optionally, the circuit board comprises a main plate and a vice plate, the main plate is arranged in the shell, the vice plate is arranged at one end of the main plate close to the detection pool, and the vice plate is connected with the light emitting device and the light detecting device after penetrating through the partition and the protective shell;

[0011] The light emitting device and the light detecting device are connected to one side of the vice plate close to the light reflecting piece, and the light emitting device and the light detecting device are arranged on the vice plate in the height direction of the detection pool.

[0012] Optionally, the light reflecting piece is a light reflecting plate.

[0013] Optionally, the side wall in the width direction of the detection pool is provided with a sample inlet, so that the water sample to be detected enters the inside of the detection pool from the sample inlet.

[0014] Optionally, the light emitting device is an ultraviolet light emitting diode, and the light detecting device is an ultraviolet detector.

[0015] Optionally, the detection unit further comprises a TDS detection module and a temperature detection module; the TDS detection module comprises two TDS probes; the temperature detection module comprises a temperature probe; the two TDS probes and the temperature probe are arranged on the partition in a spaced mode, and the two TDS probes and the temperature probe are electrically connected with the circuit board after penetrating through the partition respectively.

[0016] Optionally, the circuit board comprises an MCU main chip, a current conversion circuit, a UV275 emission circuit, a UV275 receiving circuit, a TDS detection circuit and a temperature detection circuit, the current conversion circuit, the TDS detection circuit and the temperature detection circuit are electrically connected with the MCU main chip respectively, and the current conversion circuit is electrically connected with the UV275 emission circuit and the UV275 receiving circuit.

[0017] Optionally, the electric unit further comprises a power module, and an output end of the power module is electrically connected with the circuit board.

[0018] Optionally, the power module comprises a battery pack, and the battery pack is arranged on one side of the circuit board.

[0019] Optionally, the water quality detector further comprises an operation unit and a display unit, the operation unit comprises a plurality of keys, the display unit is used for information display, the display unit comprises a display screen, the display screen and the plurality of keys are electrically connected with the circuit board, the display screen and the plurality of keys are arranged on the outer surface of the shell respectively, and the plurality of keys are located on the same side of the display screen.

[0020] Compared with the prior art, the embodiment of the utility model has the following beneficial effects:

[0021] 1. The water quality detector integrates the light emitting device and the light detecting device into a transmitting and detecting integrated module, the light emitting device and the light detecting device are located in the protective shell, and the two are connected in series, so that the current size flowing through the light emitting device and the light detecting device is consistent, and then the working temperature of the light emitting device and the light detecting device is also the same, the zero drift phenomenon of the light emitting device and the light detecting device can be effectively prevented, the accuracy and reliability of the measurement data are improved, and the water quality condition can be truly reflected.

[0022] 2.The water quality detector utilizes the reflection principle, and through the setting of the reflecting piece, the ultraviolet light emitted from the light emitting device passes through the water sample to be detected and is shot on the reflecting piece, under the reflection of the reflecting piece, the ultraviolet light passes through the water sample to be detected again from the reflecting piece and is shot on the light detecting device, the ultraviolet light is emitted-reflected-detected, therefore, the ultraviolet light path of the water quality detector includes two distances, the distance between the light emitting device and the reflecting piece, and the distance between the reflecting piece and the light detecting device, that is, the ultraviolet light path of the water quality detector is close to twice the length of the detection pool, while the ultraviolet light path of the existing water quality detection device only has one distance, that is, the distance between the ultraviolet emitting device and the ultraviolet detecting device, that is, the ultraviolet light path is close to the length of the sample pool, therefore, under the same light path condition, the length of the detection pool of the water quality detector is smaller, and the ultraviolet light path can be larger at the same time, so that the measurement result is more accurate, the water quality detector has the advantages of small size, high measurement accuracy, reasonable and compact structure, convenient to carry and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Fig. 2 is a top view structural schematic diagram of the water quality detector of an embodiment of the present application;

[0024] Figure 2 Fig. 3 is a front view structural schematic diagram of the detection pool of the water quality detector of an embodiment of the present application;

[0025] Figure 3 Fig. 4 is a side view of the circuit board and the detection pool of the water quality detector of an embodiment of the present application;

[0026] Figure 4 Fig. 5 is a structural schematic diagram of the shell of the water quality detector of an embodiment of the present application;

[0027] Figure 5 Fig. 6 is an optical path diagram of the water quality detector of an embodiment of the present application;

[0028] Figure 6 Fig. 7 is an optical path diagram of the water quality detector of another embodiment of the present application;

[0029] Figure 7 Fig. 8 is a principle diagram of the circuit board of the water quality detector of an embodiment of the present application.

[0030] Wherein: 1, shell; 11, battery mounting port; 2, electrical unit; 21, circuit board; 211, main board; 212, sub-board; 22, power module; 221, battery pack; 3, detection cell; 31, partition; 32, detection port; 33, sample inlet; 4, detection unit; 41, protective shell; 42, emission detection integrated module; 421, light emitting device; 422, light detection device; 43, reflecting piece; 44, TDS detection module; 441, TDS probe; 45, temperature detection module; 451, temperature probe; 46, connecting seat; 5, operation unit; 51, button; 6, display unit; 61, display screen. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

[0035] The utility model provides a water quality detection instrument.

[0036] In the embodiment of the present application, as shown in Figure 1 and 2 The water quality detection instrument comprises a hollow shell 1 with an open end, an electrical unit 2, a detection tank 3 and a detection unit 4.

[0037] The electrical unit 2 is arranged in the shell 1, and the electrical unit 2 comprises a circuit board 21.

[0038] The detection tank 3 is located at the end of the shell 1 with the opening, and a partition 31 is arranged at the end of the detection tank 3 close to the shell 1 to separate the shell 1 and the detection tank 3 into two independent spaces. A detection port 32 is arranged at the end of the detection tank 3 away from the shell 1 to fill the water sample to be tested into the detection tank 3.

[0039] The detection unit 4 is arranged in the detection tank 3, and the detection unit 4 comprises a protective shell 41, a transmitting and detecting integrated module 42 and a reflecting piece 43. The protective shell 41 and the reflecting piece 43 are arranged at the two sides of the length direction of the detection tank 3 and connected with the tank wall of the detection tank 3 respectively. The transmitting and detecting integrated module 42 is arranged in the protective shell 41, and the transmitting and detecting integrated module 42 is electrically connected with the circuit board 21. The transmitting and detecting integrated module 42 comprises a light emitting device 421 and a light detecting device 422 connected in series. The light emitting device 421 is used for emitting ultraviolet light, the reflecting piece 43 is used for reflecting the ultraviolet light, and the light detecting device 422 is used for detecting the reflected ultraviolet light.

[0040] The water quality detector integrates the light emitting device 421 and the light detecting device 422 into a transmitting and detecting integrated module 42, the light emitting device 421 and the light detecting device 422 are located in the protective shell 41, and the light emitting device 421 and the light detecting device 422 are connected in series, so that the current flowing through the light emitting device 421 and the light detecting device 422 is consistent, and the working temperature of the light emitting device 421 and the light detecting device 422 is also the same, which can effectively prevent the light emitting device 421 and the light detecting device 422 from drifting to zero, improve the accuracy and reliability of the measurement data, and truly reflect the water quality. The water quality detector uses the reflection principle, sets the reflecting piece 43, and the ultraviolet light emitted from the light emitting device 421 passes through the water sample to be measured and is reflected on the reflecting piece 43. Under the reflection of the reflecting piece 43, the ultraviolet light passes through the water sample to be measured again from the reflecting piece 43 and is reflected on the light detecting device 422, so that the ultraviolet light is emitted, reflected and detected. Therefore, the ultraviolet light path of the water quality detector includes two distances, i.e. the distance between the light emitting device 421 and the reflecting piece 43, and the distance between the reflecting piece 43 and the light detecting device 422, that is, the ultraviolet light path of the water quality detector is close to twice the length of the detection tank 3. The ultraviolet light path of the existing water quality detection device only has one distance, i.e. the distance between the ultraviolet emitter and the ultraviolet detector, that is, the ultraviolet light path is close to the length of the sample tank. Therefore, under the same light path condition, the length of the detection tank 3 of the water quality detector is smaller, and the ultraviolet light path can also be larger, so that the measurement result is more accurate. The water quality detector has the advantages of small size, high accuracy of measurement result, reasonable and compact structure, easy to carry and convenient to use. The water quality detector solves the problems of the existing water quality detection device, such as the zero drift phenomenon of the element, the low accuracy and reliability of the data, and the inconvenience caused by the large size of the water quality detection device.

[0041] Further, the protective shell 41 is made of a material that can penetrate ultraviolet light, such as acrylic material.

[0042] As shown in Figure 1 and 2 In an embodiment of the present application, the circuit board 21 includes a main board 211 and a sub-board 212, the main board 211 is arranged in the shell 1, the main board 211 is provided with the sub-board 212 near one end of the detection tank 3, the sub-board 212 passes through the partition plate 31 and the protective shell 41 and is connected with the light emitting device 421 and the light detecting device 422;

[0043] The light emitting device 421 and the light detecting device 422 are connected to one side of the sub-board 212 near the reflecting piece 43, and the light emitting device 421 and the light detecting device 422 are arranged on the sub-board 212 in the height direction of the detection tank 3.

[0044] The light emitting device 421 and the light detecting device 422 are arranged in the height direction of the detection pool 3 on the sub-plate 212, and the structure is reasonable and compact.

[0045] As shown in Figure 5 the embodiment of the utility model, the light reflecting piece 43 is arranged vertically in the detection pool 3, the ultraviolet light emitted by the light emitting device 421 is emitted at a certain angle, and then is emitted at a certain angle on the light detecting device 422 after passing through the light reflecting piece 43.

[0046] As shown in Figure 6 the embodiment of the utility model, the light reflecting piece 43 is arranged vertically in the detection pool 3, the ultraviolet light emitted by the light emitting device 421 is emitted at a certain angle, and then is emitted at a certain angle on the light detecting device 422 after passing through the light reflecting piece 43.

[0047] Further, the outer wall of the protective shell 41 and the outer wall of the light reflecting piece 43 are connected with the pool wall of the detection pool 3, so that the protective shell 41 and the light reflecting piece 43 can be arranged stably in the detection pool 3, and a closed space is formed in the protective shell 41 to prevent the water sample to be measured from entering the protective shell 41 and damaging the emission and detection integrated module 42.

[0048] In the embodiment of the application, the light reflecting piece 43 is a light reflecting plate.

[0049] The light reflecting piece 43 is a light reflecting plate, the light reflecting plate has a certain area, can reflect the ultraviolet light in a larger range, further improves the intensity of the ultraviolet light received by the light detecting device 422, and ensures the accuracy of the measurement result.

[0050] As shown in Figure 1 and 2 in the embodiment of the application, the side wall of the detection pool 3 in the width direction is provided with a sample inlet 33, so that the water sample to be measured enters the detection pool 3 from the sample inlet 33.

[0051] By arranging the sample inlet 33, the water sample to be measured can fill the detection pool 3 more quickly, ensures that the water sample to be measured fills the detection pool 3 completely, ensures the accuracy of the measurement result, and improves the detection efficiency.

[0052] Preferably, the number of sample inlets 33 is four. The four sample inlets 33 are arranged symmetrically on the side wall of the detection pool 3, so that the water sample to be measured enters the detection pool 3 uniformly from the four sample inlets 33, avoids the local concentration difference of the water sample in the detection pool 3, and improves the accuracy and reliability of the measurement.

[0053] In the embodiment of the application, the light emitting device 421 is an ultraviolet light emitting diode, and the light detecting device 422 is an ultraviolet detector.

[0054] The light emitting device 421 is an ultraviolet light emitting diode, which can efficiently convert the electric energy transmitted by the circuit board 21 into ultraviolet light energy, has the advantages of high conversion efficiency and low energy consumption, and the ultraviolet light emitting diode has high durability and stability. The light detecting device 422 is an ultraviolet detector, which can sensitively detect the presence of ultraviolet light, has the advantage of fast response speed, and can monitor the ultraviolet light reflected by the reflecting piece 43 in real time, thereby improving the measurement structure accuracy.

[0055] As shown in Figure 1 and 2 In an embodiment of the present application, the detection unit 4 further comprises a TDS detection module 44 and a temperature detection module 45; the TDS detection module 44 comprises two TDS probes 441; the temperature detection module 45 comprises a temperature probe 451; the two TDS probes 441 and the temperature probe 451 are arranged at intervals on the partition plate 31, and the two TDS probes 441 and the temperature probe 451 are electrically connected to the circuit board 21 after penetrating through the partition plate 31.

[0056] The TDS value refers to the total dissolved solids content, and the water quality of the water sample to be measured is purer, and the TDS value is lower, and vice versa, so that the TDS value can be used to evaluate the degree of pollution of the water body. By setting the TDS detection module 44, the dissolved solids content in the water sample to be measured can be measured, and the conductivity data of the water sample can be obtained by using the two TDS probes 441, and the data can be further converted into TDS value. By setting the temperature detection module 45, the temperature in the water can be measured, and the water temperature information measured by the temperature probe 451 can be used for temperature compensation of the measurement result of the TDS detection module 44. In combination with the TDS detection module 44 and the temperature detection module 45, the practicability of the water quality detector is improved.

[0057] In an embodiment of the present application, the detection unit 4 further comprises a connecting seat 46, the connecting seat 46 is arranged on the side of the partition plate 31 away from the shell 1, and the two TDS probes 441 and the temperature probe 451 penetrate through the connecting seat 46 and the partition plate 31 and are then electrically connected to the circuit board 21. The connecting seat 46 is arranged to improve the sealing performance of the shell 1, so as to avoid the situation that the water sample to be measured flows into the inside of the shell 1 from the detection tank 3, resulting in damage to the circuit board 21, and the connecting seat 46 can improve the convenience of installing the TDS probe 441 and the temperature probe 451 and improve the assembly efficiency.

[0058] Further, the connecting seat 46 and the partition plate 31 are provided with one-to-one through holes for the two TDS probes 441 and the temperature probe 451 to penetrate and be fixedly installed.

[0059] Further, the temperature probe 451 is a thermosensitive temperature probe.

[0060] As Figure 7 shown in the embodiment of the present application, the circuit board 21 comprises an MCU main chip, a current conversion circuit, a UV275 emission circuit, a UV275 receiving circuit, a TDS detection circuit and a temperature detection circuit, the current conversion circuit, the TDS detection circuit and the temperature detection circuit are electrically connected with the MCU main chip respectively, and the current conversion circuit is electrically connected with the UV275 emission circuit and the UV275 receiving circuit.

[0061] The current conversion circuit can process or convert the input current signal, the UV275 emission circuit can realize the light emitting device 421 to generate and emit ultraviolet light of UV275 wavelength, the UV275 receiving circuit can realize receiving the UV275 ultraviolet light after passing through the water sample to be measured, can measure the intensity change of the ultraviolet light after the ultraviolet light passing through the water sample to be measured, and convert it into an electric signal for subsequent processing, the TDS detection circuit can realize measuring the conductivity of the water sample to be measured, so as to calculate the total dissolved solids (TDS) content of the water sample, and the temperature detection circuit can realize measuring the temperature of the water sample to be measured. Therefore, the circuit board 21 can realize multi-parameter detection, and improve the accuracy of the measurement result.

[0062] Further, the power supply supplies power to the MCU main chip, the MCU main chip detects the TDS value through the TDS detection circuit, detects the temperature through the temperature detection circuit, and controls the UV275 emission circuit through the current conversion circuit, the UV275 receiving circuit receives the ultraviolet signal and converts it into an electric signal, and then converts it into a current signal through the current conversion circuit, the MCU receives the current signal and performs operation processing, calculates the attenuation amount between the emission and the reception of the UV275, and thus calculates the pollution degree of the water quality.

[0063] As Figure 1 and 3 shown in the embodiment of the present application, the electric unit 2 further comprises a power module 22, and the output end of the power module 22 is electrically connected with the circuit board 21.

[0064] The power module 22 can provide stable electric energy for the circuit board 21, the light emitting device 421 and the light detecting device 422, so as to ensure the normal work and stable operation of the water quality detector.

[0065] As Figure 1 and 3 shown in the embodiment of the present application, the power module 22 comprises a battery pack 221, and the battery pack 221 is arranged on one side of the circuit board 21.

[0066] The power module 22 comprises a battery pack 221, so that the water quality detector can operate without external power supply, greatly increasing the portability and flexibility of the water quality detector.

[0067] As shown in Figure 4 In an embodiment of the present application, the housing 1 is provided with a battery mounting port 11 and a mounting cover at the end away from the detection tank 3, the mounting cover is detachably mounted on the housing 1, and the mounting cover and the partition plate 31 of the detection tank 3 jointly enclose an enclosed space in the housing 1, at this time, the mounting cover is opened to install or replace the battery pack 221, thereby providing power for the entire water quality detector.

[0068] As shown in Figure 1 and 3 In an embodiment of the present application, the water quality detector further comprises an operation unit 5 and a display unit 6, the operation unit 5 comprises a plurality of keys 51, the display unit 6 is used for information display, the display unit 6 comprises a display screen 61, the display screen 61 and the plurality of keys 51 are electrically connected with the circuit board 21, the display screen 61 and the plurality of keys 51 are respectively arranged on the outer surface of the housing 1, and the plurality of keys 51 are located on the same side of the display screen 61.

[0069] The operation unit 5 and the display unit 6 are arranged to make it more convenient for the detection personnel to use the water quality detector to detect, and to obtain the detection data in real time after detection, and to more intuitively understand the water quality.

[0070] Specifically, the operation unit 5 is arranged to facilitate the start-up, shutdown, start of detection and end of detection of the water quality detector.

[0071] In an embodiment of the present application, the water quality detector further comprises a protective cover, the protective cover is cooperated with the housing 1 and covers the outer side of the detection tank 3, when the water quality detector is not needed, the detection tank 3 and the detection unit 4 can be protected, so that the detection tank 3 and the detection unit 4 are prevented from being damaged, and the service life of the water quality detector is further prolonged.

[0072] The working principle of an embodiment of the present application is as follows:

[0073] The protective cover is opened, the detection pool 3 is inserted into the water sample to be detected, the water sample to be detected fills the inside of the detection pool 3, the power supply provides electric energy, the circuit board 21 transmits electric energy to the light emitting device 421, the light emitting device 421 emits ultraviolet light, the ultraviolet light first passes through the test water sample, is reflected by the reflecting piece 43, secondly passes through the test water sample and is shot into the light detecting device 422, the light intensity received by the light detecting device 422 is recorded as I0. The ultraviolet light emitted by the light emitting device 421 first passes through the pure water, is reflected by the reflecting piece 43, secondly passes through the pure water and is shot into the light detecting device 422, the light intensity received by the light detecting device 422 is recorded as I1. The absorbance A of the test water sample is =lg(1 / T), wherein T is a transmittance, also called a transmittance, T=I0 / I1. According to the Beer-Lambert law, A=KBC, wherein K is an absorption coefficient, which is related to the property of the absorbing substance and the wavelength λ of incident light, and is a fixed value; B is an absorption layer thickness, that is, the distance L from the light emitting device 421 to the reflecting piece 43 is twice; C is the concentration of the absorbing substance, therefore A=lg(1 / T)=lg(I1 / I0)=K2LC, the concentration C of the absorbing substance can be further calculated, so that the pollution degree of the organic matter is judged and evaluated.

[0074] The technical principles of the utility model are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the utility model, and cannot be explained as the limitation of the protection scope of the utility model in any way. Based on the explanation herein, the person skilled in the art can think of other specific embodiments of the utility model without creative labor, and these embodiments will fall into the protection scope of the utility model.

Claims

1. A water quality detector, characterized in that, The utility model provides a water quality detection device, which comprises a hollow shell with one end being open, an electrical unit, a detection pool and a detection unit. The electrical unit is arranged in the shell, and the electrical unit comprises a circuit board. The detection pool is located at one end of the shell provided with the opening, a partition plate is arranged at one end of the detection pool close to the shell to separate the shell and the detection pool into two independent spaces, and a detection opening is formed at one end of the detection pool away from the shell to fill the water sample to be detected into the detection pool. The detection unit is arranged in the detection pool, and the detection unit comprises a protective shell, an emission and detection integrated module and a light-reflecting piece.

2. The water quality detector according to claim 1, characterized in that, The circuit board comprises a main board and a sub-board, the main board is arranged in the shell, the sub-board is arranged at one end of the main board close to the detection pool, and the sub-board is connected to the light-emitting device and the light-detecting device after penetrating through the partition plate and the protective shell. The light-emitting device and the light-detecting device are connected to one side of the sub-board close to the light-reflecting piece, and the light-emitting device and the light-detecting device are arranged on the sub-board in a spaced manner along the height direction of the detection pool.

3. The water quality detector according to claim 1, characterized in that, The light-reflecting piece is a light-reflecting plate.

4. The water quality detector of claim 1, wherein, A sample inlet is formed in the side wall of the detection pool in the width direction, so that the water sample to be detected enters the detection pool from the sample inlet.

5. The water quality detector of claim 1, wherein, The light-emitting device is an ultraviolet light-emitting diode, and the light-detecting device is an ultraviolet detector.

6. The water quality detector according to claim 5, characterized in that, The detection unit further comprises a TDS detection module and a temperature detection module.

7. The water quality detector according to claim 6, characterized in that, The circuit board comprises an MCU main chip, a current conversion circuit, a UV275 emission circuit, a UV275 receiving circuit, a TDS detection circuit and a temperature detection circuit, the current conversion circuit, the TDS detection circuit and the temperature detection circuit are electrically connected to the MCU main chip, and the current conversion circuit is electrically connected to the UV275 emission circuit and the UV275 receiving circuit.

8. The water quality detector of claim 1, wherein, The electrical unit further comprises a power module, and an output end of the power module is electrically connected to the circuit board.

9. The water quality detector according to claim 8, characterized in that, The power module comprises a battery pack, and the battery pack is arranged on one side of the circuit board.

10. The water quality detector of claim 1, wherein, The water quality detector further comprises an operation unit and a display unit, the operation unit comprises a plurality of buttons, the display unit is used for information display, the display unit comprises a display screen, the display screen and the plurality of buttons are electrically connected with the circuit board, the display screen and the plurality of buttons are respectively arranged on the outer surface of the shell, and the plurality of buttons are located on the same side of the display screen.

Images