Low range high precision turbidity sensor automatic cleaning brush device and turbidity sensor

Abstract

The present invention provides a low-range high-precision turbidity sensor automatic brush cleaning device, comprising a mounting plate, a driving motor, a photoelectric switch, a brush assembly and an MCU control unit, wherein the driving motor is sealed and mounted on the rear side of the mounting plate and the output shaft extends to the front side of the mounting plate, and the brush assembly comprises a sealing sleeve, a brush rod and a brush; a circular hole is arranged on the brush rod, a photoelectric switch is arranged on the mounting plate, and the optical path of the photoelectric switch corresponds to the circular hole; when the MCU sends a cleaning instruction, the driving motor drives the brush to rotate to clean the turbidity sensor; when the circular hole passes through the photoelectric switch during rotation, the photoelectric switch triggers and sends an induction signal to the MCU control unit, and the driving motor resets to keep the brush away from the induction end of the turbidity sensor. The device has the advantages of automatic cleaning, automatic homing, no influence on the use of the turbidity sensor, and reduced maintenance workload and cost.

Description

Technical Field

[0001] The invention relates to the field of cleaning of drinking water turbidity sensors, in particular to an automatic cleaning brush device for a low-range high-precision turbidity sensor and a low-range high-precision turbidity sensor with the device. Background Art

[0002] In the process of drinking water quality monitoring, especially high-quality drinking water, since the turbidity value of the water body itself is relatively low, the turbidity sensor is required to have the characteristics of low range and high accuracy.

[0003] In order to achieve long-term accurate, effective and reliable measurement data, reduce the adhesion of impurities in the water to the sensor measurement interface and affect the turbidity measurement value, and reduce the influence of bubbles in the water on the turbidity measurement results, the turbidity sensor needs to be cleaned regularly.

[0004] In the past, relevant units organized operation and maintenance personnel to go to the site regularly to manually clean the turbidity sensors and sensor flow channels. This would take up a lot of manpower and time, and increase the operation and maintenance costs of tap water and other water production and sales companies.

[0005] In addition, when the operation and maintenance personnel clean the turbidity sensor, it also interferes with the rhythm of online monitoring of the turbidity sensor. Sometimes it is necessary to interrupt the operation of the online monitor first. Moreover, after cleaning, the influence of bubbles on the turbidity measurement results during long-term continuous monitoring cannot be avoided.

[0006] Another common cleaning method is to use an ultrasonic vibration device for cleaning. The disadvantages of ultrasonic vibration cleaning devices are that they have a complex structure, are inconvenient to install and maintain, have strong cleaning force, are easy to damage the turbidity sensor and flow slot, and sometimes affect the test results. In addition, the price of this device is relatively expensive.

[0007] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0008] The purpose of the present invention is to address the deficiencies in the prior art and thereby provide a low-range high-precision turbidity sensor automatic cleaning brush device and a low-range high-precision turbidity sensor with an automatic cleaning brush device, which can automatically clean and return to their original position, does not affect the use of the turbidity sensor, and reduces maintenance workload and costs.

[0009] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: an automatic brush cleaning device for a low-range high-precision turbidity sensor, comprising a mounting plate, a drive motor, a photoelectric switch, a brush assembly and an MCU control unit, wherein the drive motor is sealed and mounted on the rear side of the mounting plate and the output shaft extends to the front side of the mounting plate, and the brush assembly comprises a sealing sleeve sleeved on the output shaft of the drive motor, a brush rod fixed on the sealing sleeve and a brush fixed on the brush rod;

[0010] A circular hole is arranged on the brush rod, and a photoelectric switch is arranged on the mounting plate, wherein the optical path of the photoelectric switch corresponds to the circular hole;

[0011] The control circuits of the photoelectric switch and the drive motor are both connected to the MCU control unit. When the MCU sends a cleaning instruction to the drive motor, the drive motor drives the brush to rotate to clean the sensing end of the turbidity sensor. When the circular hole passes the photoelectric switch during rotation, the photoelectric switch is triggered and sends a sensing signal to the MCU control unit. The MCU control unit controls the drive motor to reach a reset state to keep the brush away from the sensing end of the turbidity sensor.

[0012] Based on the above, the driving motor is a stepping motor.

[0013] Based on the above, the MCU control unit is connected to the host computer system through a wired network or a wireless communication module.

[0014] Based on the above, there is an angle between the extension direction of the brush and the output shaft of the motor.

[0015] A low-range high-precision turbidity sensor with an automatic brush cleaning device, comprising a low-range high-precision turbidity sensor, a mounting plate, a drive motor, a photoelectric switch, a brush assembly and an MCU control unit, wherein the low-range high-precision turbidity sensor, the drive motor and the photoelectric switch are all sealed and mounted on the mounting plate, the sensing head of the low-range high-precision turbidity sensor, the output shaft of the drive motor and the photoelectric switch are all located on the front side of the mounting plate, the sensing end of the low-range high-precision turbidity sensor is an inclined surface, the brush assembly comprises a sealing sleeve sleeved on the output shaft of the drive motor, a brush rod fixed on the sealing sleeve and a brush fixed on the brush rod, and the inclination angle of the brush is consistent with the inclination angle of the sensing end of the low-range high-precision turbidity sensor;

[0016] When the driving motor drives the brush to rotate, the brush passes through the sensing end of the low-range high-precision turbidity sensor and performs scrubbing;

[0017] A circular hole is arranged on the brush rod, and the optical path of the photoelectric switch corresponds to the circular hole;

[0018] The control circuits of the photoelectric switch and the drive motor are both connected to the MCU control unit. When the MCU sends a cleaning instruction to the drive motor, the drive motor drives the brush to rotate to clean the sensing end of the low-range high-precision turbidity sensor. When the circular hole passes through the photoelectric switch during rotation, the photoelectric switch is triggered and sends a sensing signal to the MCU control unit. The MCU control unit controls the drive motor to reach a reset state to keep the brush away from the sensing end of the low-range high-precision turbidity sensor.

[0019] The low-range high-precision turbidity sensor is also connected to the MCU control unit to collect water quality data.

[0020] Based on the above, the driving motor is a stepping motor.

[0021] Based on the above, the MCU control unit is connected to the host computer system through a wired network or a wireless communication module.

[0022] Based on the above, the sealing sleeve is provided with a slot for inserting and removing the brush rod, and the brush rod is inserted in the slot.

[0023] Based on the above, the brush is a row-shaped brush, a roller-shaped brush or a round-bundle-shaped brush.

[0024] Based on the above, the brush is detachably mounted on the distal end of the brush rod.

[0025] The present invention has outstanding substantial features and significant progress compared to the prior art. Specifically, the present invention provides a cleaning device composed of a miniature stepping motor, a photoelectric switch, a brush assembly, etc., which can physically clean the turbidity sensor, which can not only eliminate the influence of bubbles in the water body on the turbidity value, but also extend the maintenance cycle of the sensor and greatly reduce the workload and cost of manual maintenance.

[0026] Furthermore, through structural design and the associated configuration of the photoelectric switch and the stepper motor, the precision control of automatic cleaning is ensured, so that the brush is kept away from the sensing end interface of the turbidity sensor before and after cleaning, without affecting the measurement accuracy of the turbidity sensor.

[0027] The modular design concept and plug-and-play structure allow the device to be combined with different turbidity sensors to expand its usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a low-range high-precision turbidity sensor with an automatic cleaning brush device in the present invention.

[0029] Figure 2 It is a bottom view of the low-range high-precision turbidity sensor with an automatic cleaning brush device in the present invention.

[0030] In the figure: 1. Low-range high-precision turbidity sensor; 2. Mounting plate; 3. Stepper motor; 4. Photoelectric switch; 5. Sensing end; 6. Sealing sleeve; 7. Brush rod; 8. Brush; 9. Round hole; 10. MCU control unit. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0032] like Figure 1 and Figure 2 As shown, a low-range high-precision turbidity sensor with an automatic cleaning brush device comprises a low-range high-precision turbidity sensor 1, a mounting plate 2, a miniature stepper motor 3, a photoelectric switch 4, a brush assembly and an MCU control unit. The low-range high-precision turbidity sensor 1, the stepper motor 3 and the photoelectric switch 4 are all sealed and mounted on the mounting plate 2. The sensing head of the low-range high-precision turbidity sensor 1, the output shaft of the stepper motor 3 and the photoelectric switch 4 are all located on the front side of the mounting plate 2. The sensing end 5 of the low-range high-precision turbidity sensor 1 is an inclined surface. The brush assembly comprises a sealing sleeve 6 sleeved on the output shaft of the driving motor, a brush rod 7 fixed on the sealing sleeve 6 and a brush 8 fixed on the brush rod 7. The inclination angle of the brush 8 is consistent with the inclination angle of the sensing end of the low-range high-precision turbidity sensor 1.

[0033] When the stepping motor 3 drives the brush 8 to rotate, the brush 8 makes a circular motion and passes through the sensing end of the low-range high-precision turbidity sensor 1 to clean the interface of the sensing end.

[0034] The low-range high-precision turbidity sensor 1 is also connected to the MCU control unit to collect water quality data, and upload the collected water quality data to the host computer system through a wired network, such as optical fiber, or a wireless communication network, such as 3G and 4G networks.

[0035] In order to improve the replaceable property of the brush assembly, the sealing sleeve is provided with a slot for inserting and removing the brush rod 7, and the brush rod 7 is inserted into the slot. The brush is detachably mounted at the distal end of the brush rod, such as a conventional plug-in structure such as a slot structure.

[0036] In this embodiment, the shape of the brush is a row of brushes, a roller brush, or a round bundle of brushes, which can be selected according to different scenarios and different turbidity sensors.

[0037] Working principle:

[0038] The host computer system is set according to the time, and the sensing end interface of the low-range high-precision turbidity sensor 1 is cleaned regularly. First, after receiving the instruction, the MCU control unit 10 first queries the state of the photoelectric switch. If the photosensitive light path of the photoelectric switch passes through the circular hole 9, the photoelectric switch is in state 1, indicating that the brush 8 is in the reset state. If the photosensitive path of the photoelectric switch cannot be conducted, the photoelectric switch is in state 0, indicating that the brush is not reset. At this time, the MCU control unit 10 processes the instruction and sends it to the control circuit of the stepper motor 3. The stepper motor 3 drives the brush 8 to rotate to the reset state, so that the photoelectric switch is in state 1 to achieve reset.

[0039] Then, the MCU control unit sends a cleaning instruction to the stepper motor 3, and the stepper motor drives the brush 8 to rotate. When the rotation path of the brush 8 passes through the sensing end interface of the sensor, the interface is cleaned to remove impurities and bubbles attached to the light source and the detection window, and the brush 8 continues to rotate. When the brush 8 rotates to a specific position, the circular hole 9 on the brush rod 7 is aligned with the photoelectric switch 4. When the photosensitive light path of the photoelectric switch passes through the circular hole 9, the switch state of the photoelectric switch 4 changes to 1, so that the brush returns to the reset state. After the MCU control unit obtains the state change information of the photoelectric switch 4, it controls the brush on the stepper motor to stop rotating, completes the cleaning task, and waits for the host computer system to issue a task to clean again.

[0040] After the cleaning module is finished, the system host computer software sends a data collection instruction to the system MCU control unit. The system MCU control unit collects data from water quality sensors such as low-range high-precision turbidity sensors. At the same time, the system MCU control unit sends the collected water quality data to the host computer software. The host computer software processes and displays the received water quality data, and packages the processed water quality data, and sends the water quality data and alarm information to the designated big data platform for display through wired optical fiber or 3G / 4G wireless transmission module.

[0041] At this point, a complete process of integrating the online water quality monitoring instrument has been completed, mainly including automatic cleaning, water quality data collection, data processing, data display, data transmission, etc. The system will start to repeat the new process at the next set time point.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. An automatic brush cleaning device for a low-range, high-precision turbidity sensor, characterized in that: It includes a mounting plate, a driving motor, a photoelectric switch, a brush assembly and an MCU control unit. The driving motor is sealed and mounted on the rear side of the mounting plate, and the output shaft extends to the front side of the mounting plate. The brush assembly includes a sealing sleeve sleeved on the output shaft of the driving motor, a brush rod fixed on the sealing sleeve, and a brush fixed on the brush rod. A circular hole is arranged on the brush rod, and a photoelectric switch is arranged on the mounting plate, wherein the optical path of the photoelectric switch corresponds to the circular hole; The control circuits of the photoelectric switch and the drive motor are both connected to the MCU control unit. When the MCU control unit sends a cleaning instruction to the drive motor, the drive motor drives the brush to rotate to clean the sensing end of the turbidity sensor. When the circular hole passes the photoelectric switch during rotation, the photoelectric switch is triggered and sends a sensing signal to the MCU control unit. The MCU control unit controls the drive motor to reach a reset state to keep the brush away from the sensing end of the turbidity sensor.

2. The automatic brush cleaning device for a low-range high-precision turbidity sensor according to claim 1 is characterized in that: The driving motor is a stepping motor.

3. The automatic brush cleaning device for a low-range high-precision turbidity sensor according to claim 1 or 2, characterized in that: The MCU control unit is connected to the host computer system via a wired network or a wireless communication module.

4. The automatic brush cleaning device for a low-range high-precision turbidity sensor according to claim 3 is characterized in that: There is an included angle between the extension direction of the brush and the output shaft of the motor.

5. A low-range, high-precision turbidity sensor with an automatic brush cleaning device, characterized in that: It comprises a low-range high-precision turbidity sensor, a mounting plate, a drive motor, a photoelectric switch, a brush assembly and an MCU control unit. The low-range high-precision turbidity sensor, the drive motor and the photoelectric switch are all sealed and mounted on the mounting plate. The sensing head of the low-range high-precision turbidity sensor, the output shaft of the drive motor and the photoelectric switch are all located on the front side of the mounting plate. The sensing end of the low-range high-precision turbidity sensor is an inclined surface. The brush assembly comprises a sealing sleeve sleeved on the output shaft of the drive motor, a brush rod fixed on the sealing sleeve and a brush fixed on the brush rod. The inclination angle of the brush is consistent with the inclination angle of the sensing end of the low-range high-precision turbidity sensor. When the driving motor drives the brush to rotate, the brush passes through the sensing end of the low-range high-precision turbidity sensor and performs scrubbing; A circular hole is arranged on the brush rod, and the optical path of the photoelectric switch corresponds to the circular hole; The control circuits of the photoelectric switch and the drive motor are both connected to the MCU control unit. When the MCU control unit sends a cleaning instruction to the drive motor, the drive motor drives the brush to rotate to clean the sensing end of the low-range high-precision turbidity sensor. When the circular hole passes through the photoelectric switch during rotation, the photoelectric switch is triggered and sends a sensing signal to the MCU control unit. The MCU control unit controls the drive motor to reach a reset state to keep the brush away from the sensing end of the low-range high-precision turbidity sensor. The low-range high-precision turbidity sensor is also connected to the MCU control unit to collect water quality data.

6. The low-range high-precision turbidity sensor with an automatic cleaning brush device according to claim 5, characterized in that: The driving motor is a stepping motor.

7. The low-range high-precision turbidity sensor with an automatic cleaning brush device according to claim 5 or 6, characterized in that: The MCU control unit is connected to the host computer system via a wired network or a wireless communication module.

8. The low-range high-precision turbidity sensor with an automatic cleaning brush device according to claim 7, characterized in that: The sealing sleeve is provided with a slot for inserting and removing the brush rod, and the brush rod is inserted into the slot.

9. The low-range high-precision turbidity sensor with an automatic cleaning brush device according to claim 8, characterized in that: The brush is a row-shaped brush, a roller-shaped brush or a round-bundle-shaped brush.

10. The low-range high-precision turbidity sensor with an automatic cleaning brush device according to claim 8 or 9, characterized in that: The brush is detachably mounted on the distal end of the brush rod.

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