A dual-color water quality detection device
By using a dual-color water quality testing device that combines optical fiber and photodiode, the timeliness and accuracy of water quality testing during tap water transportation have been solved, enabling rapid and accurate testing and online monitoring of tap water.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 深圳市环境水务集团有限公司
- Filing Date
- 2025-05-20
- Publication Date
- 2026-06-02
AI Technical Summary
Existing water quality testing devices cannot detect in a timely and accurate manner any pollution that may occur during the transportation of tap water.
The dual-color water quality detection equipment utilizes light emitted from first and second monochromatic light sources, which are split into two paths by optical fiber. The light is incident on different planes of the color detection cell and received by photodiodes. Combined with the control circuit, real-time monitoring is performed. Rapid and accurate water quality detection is achieved by referencing and measuring the optical path difference of the optical path.
It enables rapid and accurate detection during the water supply process, allowing for timely detection of water pollution and sample retention, and supports real-time online monitoring of drinking water and secondary water supply.
Smart Images
Figure CN224317508U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to water quality testing equipment, and more particularly to a dual-color water quality testing equipment. Background Technology
[0002] Currently, during the process of transporting tap water through pipelines to pumping stations, some pollution often occurs, and existing detection devices cannot detect it in a timely and accurate manner. Summary of the Invention
[0003] To address the problems in the existing technology, this utility model provides a dual-color water quality detection device.
[0004] This utility model provides a dual-color water quality detection device, including a color detection pool, an inlet pipe, an inlet valve, a first monochromatic light source, a first optical fiber, a second monochromatic light source, a second optical fiber, a first photodiode, a second photodiode, a third photodiode, a fourth photodiode, and a control circuit. The inlet pipe is connected to the inlet of the color detection pool, and the inlet valve is located on the inlet pipe. The color detection pool has a cavity for holding a water sample, which has a first plane, a second plane, a third plane, and a fourth plane. The first plane is parallel to the third plane, and the second plane is parallel to the fourth plane. The first and second photodiodes are respectively disposed on the third plane, and the third and fourth photodiodes are... The light emitted by the first monochromatic light source is split into two by the first optical fiber. One path serves as the measurement optical path, entering from the first plane and being received by the first photodiode on the third plane; the other path serves as the reference optical path, entering from the second plane and being received by the third photodiode on the fourth plane. The light emitted by the second monochromatic light source is split into two by the second optical fiber. One path serves as the measurement optical path, entering from the first plane and being received by the second photodiode on the third plane; the other path serves as the reference optical path, entering from the second plane and being received by the fourth photodiode on the fourth plane. The control circuit is connected to the water inlet valve, the first photodiode, the second photodiode, the third photodiode, and the fourth photodiode, respectively.
[0005] As a further improvement of this utility model, the distance between the first plane and the third plane is greater than the distance between the second plane and the fourth plane.
[0006] As a further improvement of this utility model, the water inlet pipe is connected to a sample retention pipe, and a sample retention valve is provided on the sample retention pipe.
[0007] As a further improvement of this utility model, the first plane and the second plane are perpendicular to each other.
[0008] As a further improvement of this utility model, the control circuit is an environmental protection online monitoring instrument controller.
[0009] As a further improvement of this utility model, the control circuit is connected to a host computer.
[0010] As a further improvement of this utility model, the color detection pool is connected to a drainage pipe.
[0011] The beneficial effects of this utility model are: through the above solution, a dual-color water quality detection device is provided, which can quickly and accurately detect water quality during the process of tap water being transported to the pumping station through pipelines, and realize real-time online monitoring of drinking water and secondary water supply. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other solutions can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of a dual-color water quality testing device according to this utility model;
[0014] Figure 2 This is a schematic diagram of the optical path of the first monochromatic light source of a dual-color water quality testing device of this utility model;
[0015] Figure 3 This is a schematic diagram of the optical path of the second monochromatic light source in a dual-color water quality testing device of this utility model. Detailed Implementation
[0016] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0020] like Figures 1 to 3 As shown, a dual-color water quality detection device includes a color detection pool 1, an inlet pipe 2, an inlet valve 3, a first monochromatic light source 6, a first optical fiber 8, a second monochromatic light source 7, a second optical fiber 9, a first photodiode 101, a second photodiode 102, a third photodiode 103, a fourth photodiode 104, and a control circuit (not shown in the figure).
[0021] The water inlet pipe 2 is connected to the water inlet of the color detection pool 1, and the water inlet valve 3 is installed on the water inlet pipe 2, which can be used to control the water inlet.
[0022] The color detection cell 1 has a cavity for holding a water sample. This cavity has a first plane 10, a second plane 20, a third plane 30, and a fourth plane 40. The first plane 10 is parallel to the third plane 30, and the second plane 20 is parallel to the fourth plane 40. A first photodiode 101 and a second photodiode 102 are respectively disposed on the third plane 30, and a third photodiode 103 and a fourth photodiode 104 are respectively disposed on the fourth plane 40. The light emitted from the first monochromatic light source 6 is split into two by the first beam splitter 9. One beam serves as the measurement light path, entering from the first plane 10 and passing through the first photodiode on the third plane 30. Diode 101 receives the light; another path serves as a reference optical path, incident from the second plane 20, and received by the third photodiode 103 on the fourth plane 40; the light emitted by the second monochromatic light source 7 is split into two by the second optical fiber 9, one path serving as a measurement optical path, incident from the first plane 10, and received by the second photodiode 102 on the third plane 30; the other path serves as a reference optical path, incident from the second plane 20, and received by the fourth photodiode 104 on the fourth plane 40. The control circuit is connected to the water inlet valve 3, the first photodiode 101, the second photodiode 102, the third photodiode 103, and the fourth photodiode 104, respectively.
[0023] The distance between the first plane 10 and the third plane 30 is greater than the distance between the second plane 20 and the fourth plane 40. That is, the optical path between the second plane 20 and the fourth plane 40 is shorter, while the optical path between the first plane 10 and the third plane 30 is longer. The side with the shorter optical path is used as a reference, and the side with the longer optical path is used as the receiver. The actual optical path is the difference between the optical paths of the two perpendicular planes.
[0024] The water inlet pipe 2 is connected to a sample retention pipe 4, and the sample retention pipe 4 is equipped with a sample retention valve 5, which can be used for sample retention.
[0025] The first plane 10 and the second plane 20 are perpendicular to each other.
[0026] The control circuit is an environmental online monitoring instrument controller, preferably the environmental online monitoring instrument controller V2.1.
[0027] The control circuit can use a microcontroller or other controller.
[0028] The control circuit is connected to a host computer via wired or wireless means.
[0029] The color detection pool 1 is connected to a drainage pipe 11.
[0030] In this embodiment, a 420nm light source is used as the first monochromatic light source 6, and a 525nm light source is used as the second monochromatic light source 7 for water quality detection as follows:
[0031] When the device starts sampling, the inlet valve 3 is opened first, allowing pressurized water to enter the color detection pool 1. After a period of time, the residual water sample from the previous sampling is completely replaced with a new water sample. At this point, the inlet valve 3 is closed, and the control circuit (Environmental Online Monitoring Instrument Controller V2.1) provides constant current sources to the 525nm and 420nm light sources respectively, driving the light sources to emit stable monochromatic light. The monochromatic light is split by a 1-to-2 optical fiber mounted on the optical fiber fixing component of the light source, and then illuminates two perpendicular surfaces. The side with the shorter optical path serves as the reference, and the side with the longer optical path serves as the receiver. The actual optical path is the difference between the optical paths of the two perpendicular surfaces. Photodiodes are installed on opposite sides of the incident light as the reference and receiver, respectively. The photodiodes can linearly convert the received light intensity into a weak light. The system uses a current signal control circuit (Environmental Protection Online Monitoring Instrument Controller V2.1) to collect and receive the detected current signal from the reference circuit. After IV and AD conversion, the absorbance is calculated, and the specific color measurement value is calculated based on the calibration curve (the calculation of the color measurement value is existing technology, and this utility model does not propose any improvement on how to calculate the color measurement value). When the water sample is polluted (e.g., excessive rust or permanganate), it can be promptly indicated by yellow and pink. When any color measurement value exceeds the preset alarm threshold, the system will open the sample retention valve 5 to retain the sample for manual comparison. The color value can be transmitted to the host computer via RS232 and RS485 interfaces. When the system malfunctions, the human-machine interface will provide an alarm prompt.
[0032] This utility model discloses a dual-color water quality testing device, which can quickly and accurately test the water quality during the process of tap water being transported to the pumping station through pipelines, and realize real-time online monitoring of drinking water and secondary water supply.
[0033] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A dual-color water quality testing device, characterized in that: The device includes a color detection cell, a water inlet pipe, a water inlet valve, a first monochromatic light source, a first optical fiber, a second monochromatic light source, a second optical fiber, a first photodiode, a second photodiode, a third photodiode, a fourth photodiode, and a control circuit. The water inlet pipe is connected to the water inlet of the color detection cell, and the water inlet valve is located on the water inlet pipe. The color detection cell has a cavity for holding a water sample, which has a first plane, a second plane, a third plane, and a fourth plane. The first plane is parallel to the third plane, and the second plane is parallel to the fourth plane. The first and second photodiodes are respectively located on the third plane, and the third and fourth photodiodes are respectively located on the fourth plane. Above; the light emitted by the first monochromatic light source is split into two by the first optical fiber. One path serves as the measurement optical path, incident from the first plane and received by the first photodiode on the third plane; the other path serves as the reference optical path, incident from the second plane and received by the third photodiode on the fourth plane. The light emitted by the second monochromatic light source is split into two by the second optical fiber. One path serves as the measurement optical path, incident from the first plane and received by the second photodiode on the third plane; the other path serves as the reference optical path, incident from the second plane and received by the fourth photodiode on the fourth plane. The control circuit is connected to the water inlet valve, the first photodiode, the second photodiode, the third photodiode, and the fourth photodiode, respectively.
2. The dual-color water quality testing device according to claim 1, characterized in that: The distance between the first plane and the third plane is greater than the distance between the second plane and the fourth plane.
3. The dual-color water quality testing device according to claim 1, characterized in that: The inlet pipe is connected to a sample retention pipe, and the sample retention pipe is equipped with a sample retention valve.
4. The dual-color water quality testing device according to claim 1, characterized in that: The first plane and the second plane are perpendicular to each other.
5. The dual-color water quality testing device according to claim 1, characterized in that: The control circuit is an environmental online monitoring instrument controller.
6. The dual-color water quality testing device according to claim 1, characterized in that: The control circuit is connected to a host computer.
7. The dual-color water quality testing device according to claim 1, characterized in that: The color detection pool is connected to a drainage pipe.