Calibration device and calibration method for oil-water mixture sensor

Abstract

The invention provides an oil-water mixture sensor verification device and a verification method thereof, and relates to the field of oil-water mixture annunciator verification. According to the verification device for the oil-water mixture sensor, the double-paddle design is adopted, the ultrasonic vibration module and the heating disc are added, the miscibility between oil and water is effectively improved, the added ultrasonic vibration module further has a vibration function, and the heating disc is matched, so that the simulation environment of oil-water mixture better fits the actual situation. By arranging the automatic water adding device and the automatic oil adding device and additionally arranging the check valves at the liquid outlet end of the water inlet pipe and the liquid outlet end of the oil inlet pipe, accurate liquid adding is achieved, and multi-point dynamic inspection is achieved; by adding a plurality of standard tank bodies, cleaning tank bodies, dewatering tank bodies and manipulators, batch multi-point static inspection is realized. The method is more accurate and convenient in verification, has single verification and batch verification capabilities, and also has dynamic and static multi-point verification capabilities.

Description

Technical Field

[0001] The present invention relates to the field of oil-water mixing signal device calibration, and in particular to an oil-water mixing sensor calibration device and a calibration method thereof. Background Art

[0002] There are many devices that use oil in hydropower plants, including transformers, speed regulators, cylinder valves, upper guide bearings, thrust bearings, lower guide bearings, water guide bearings, etc. The oil plays the role of insulation, cooling, lubrication, sealing, etc. When the turbine generator set is running, the oil temperature at various locations rises, and the best solution at present is to cool it through water flow. However, water enters the oil, affecting the performance of the oil, so an oil-water mixing sensor is installed at the oil position. When there is oil-water mixing, the oil-water mixing sensor will sound an alarm. The oil-water mixing sensor plays an important role in the stable operation of the hydropower plant. The oil-water mixing sensor needs to be regularly inspected and calibrated as required. In addition to being used in hydropower plants, the oil-water mixing sensor is also used in the following industries: Petrochemical industry: In refineries and chemical plants, oil-water mixing sensors can be used to monitor the quality of oil in storage tanks and pipelines to prevent water contamination from causing product quality degradation or damage to production equipment.

[0003] Shipbuilding: Ships' engines and transmission systems rely on high-quality lubricants. Oil-water sensors can help crews detect excessive water content in the oil and prevent engine failures.

[0004] Automobile manufacturing: In the automobile manufacturing process, especially for parts that require precision lubrication, oil-water mixing sensors can ensure the quality of the lubricating oil and avoid corrosion and wear caused by water.

[0005] Aerospace: In airplanes and other aircraft, oil-water mixing sensors are used to monitor the oil quality of hydraulic and lubrication systems to ensure flight safety.

[0006] Mechanical manufacturing: In various types of mechanical equipment, such as machine tools and compressors, oil-water mixing sensors can detect the status of lubricating oil, helping maintenance personnel detect problems in advance and reduce unplanned downtime.

[0007] In order to ensure that the oil-water mixing sensor used is accurate and reliable and to ensure the safe and stable operation of the unit, the oil-water mixing sensor needs to be calibrated after a period of use.

[0008] However, existing oil-water mixing sensor calibration devices still have some problems. For example, Chinese invention patent 2019112327229 discloses a calibration device and method for an oil-water mixing sensor. During use, oil and water are injected into a liquid distribution area of ​​a graduated transparent container through an injection hole, and the injection volume is controlled according to the scale. The calibration device's liquid distribution area contains residue, resulting in low accuracy. Furthermore, testing at room temperature fails to align with the normal operating environment of an oil-water mixing sensor, resulting in inaccurate calibration. Furthermore, the device lacks multi-point calibration, making it impossible to quickly and mass-produce oil-water mixing sensors. Summary of the Invention

[0009] The main purpose of this application is to provide an oil-water mixing sensor calibration device and a calibration method thereof, aiming to solve the technical problems of the existing oil-water mixing sensor calibration device and realize fast, accurate and batch inspection of oil-water mixing sensors.

[0010] The present invention provides a device for calibrating an oil-water mixture sensor, comprising a main tank, a stirring device, a heating device, a standard oil-water mixture sensor, and a wiring control module. The main tank is mounted with a tank lid, and the standard oil-water mixture sensor is mounted on the tank lid and measures the liquid within the main tank. The stirring device, heating device, and standard oil-water mixture sensor are electrically connected to the wiring control module. The tank lid is also provided with a through-hole for receiving the oil-water mixture sensor to be tested. The stirring device thoroughly stirs the oil-water mixture, and the heating device heats the oil-water mixture, simulating the operating temperature of the oil-water mixture sensor to be tested while also rapidly and thoroughly mixing the oil and water.

[0011] Furthermore, in order to facilitate on-site inspection by movement, the calibration device also includes a base and a backplate. The backplate and the main tank body are fixedly mounted on the base. The wiring control module includes a digital display device, a terminal post, and a speed regulator. The stirring device includes a motor and blades. The motor is connected to the speed regulator through the terminal post. The standard oil-water mixing sensor and the oil-water mixing sensor to be tested are electrically connected to the digital display device through the terminal post, thereby realizing simplified and convenient inspection of the oil-water mixing sensor to be tested.

[0012] More preferably, the paddle blades include an upper stirring blade and a lower stirring blade, and the upper stirring blade and the lower stirring blade are installed relative to each other, pushing and stirring the liquid relative to each other, effectively squeezing the oil suspended on the surface of the liquid to the bottom of the main tank body, and achieving full mixing of oil and water.

[0013] To further describe the above solution, a release valve is provided at the bottom edge of the main tank body to facilitate discharge after cleaning the main tank body.

[0014] Optionally, the heating device is a heating plate installed at the bottom of the main tank body, and a temperature sensor for measuring the liquid is installed in the tank body to fit the temperature of the oil-water mixture, ensuring that the inspection is more scientific and accurate.

[0015] In another technical solution, the main tank is further equipped with a water inlet pipe, an oil inlet pipe, and a liquid discharge pipe. The water inlet pipe is connected to a pump body with a flow meter, and the water outlet of the water inlet pipe is located at the top of the main tank. A check valve is also installed at the water outlet to achieve automatic and precise liquid refilling. The oil inlet pipe is connected to a pump body with a flow meter, and the oil outlet of the oil inlet pipe is located at the top of the main tank. A check valve is also installed at the oil outlet. The liquid discharge pipe is located at the bottom of the main tank, and a negative pressure valve is installed at one end of the liquid discharge pipe located at the main tank.

[0016] More preferably, the main tank body is installed on a base, and a cleaning tank body, a dehydration tank body, a standard tank body, a manipulator and a control cabinet are also installed on the base. The wiring control module is installed in the control cabinet, and the control cabinet is also provided with a touch screen. The cleaning tank body, the dehydration tank body, the standard tank body and the main tank body are installed in a ring shape around the manipulator. The cleaning tank body is provided with a number of nozzles and an ultrasonic vibration module. The nozzles and ultrasonic vibration modules are used to clean the oil-water mixture sensor to be detected. A valve is provided at the bottom of the cleaning tank body to facilitate drainage. A gas nozzle for blowing dry the oil-water mixture sensor to be detected is installed in the dehydration tank body. The oil-water mixture sensor to be detected is blown dry after cleaning to ensure that there is no residue and the inspection is more accurate. An ultrasonic vibration module, a heating device, a temperature sensor and a standard oil-water mixture sensor are installed in the standard tank body. There are more than two standard tank bodies. The corresponding proportion of standard oil-water mixture is adjusted through a test tube and then poured into the standard tank body.

[0017] Furthermore, the manipulator moves the oil-water mixture sensor to be detected via a lifting rod, a rocker arm, and a suction nozzle at the end of the rocker arm, and the stirring device in the main tank includes an ultrasonic vibration module. The suction nozzle at the end of the rocker arm can be a magnet or a vacuum nozzle.

[0018] The present invention also provides a calibration method for an oil-water mixing sensor, comprising the following steps: Step S1: Add appropriate amount of oil and water into the main tank; Step S2: Place the oil-water mixture sensor to be detected into the main tank; Step S3: Connect the standard oil-water mixing sensor, the oil-water mixing sensor to be tested, the heating device, and the motor to the terminal posts; Step S4: Turn on the speed regulator power switch and the heating device switch, adjust the speed regulator voltage adjustment knob, adjust the motor speed, and the motor drives the stirring blade to rotate to mix the oil and water; Step S5: When the digital display device shows that the data of the standard oil-water mixture sensor is consistent with the oil-water mixture, the data of the oil-water mixture sensor to be tested is checked to determine whether the oil-water mixture sensor to be tested is qualified.

[0019] Optionally, in step S1, oil and water are automatically added through the pump body, and the water content of the mixed liquid is gradually increased, and multi-point calibration or multi-point detection is performed on the oil-water mixture sensor to be detected.

[0020] More preferably, in step S2, the oil-water mixture sensor to be detected is clamped by a robot, and the robot places the oil-water mixture sensor to be detected into a standard tank for multi-point calibration or multi-point detection. Before the oil-water mixture sensor to be detected is placed into the standard tank, it needs to be placed in a cleaning tank for cleaning and then placed in a dehydration tank for dehydration and drying.

[0021] Compared to existing technologies, the oil-water mixing sensor calibration device provided by this invention can adopt different testing schemes depending on the actual situation. To ensure more uniform mixing, the motor adopts a dual-blade design, which counteracts the lighter oil and heavier water. An ultrasonic vibration module is also incorporated, utilizing the cavitation effect generated by ultrasound to destroy tiny bubbles in the liquid. When these bubbles burst, they generate shock waves, helping to break up large oil droplets and evenly distribute them in the water. A heating plate is also incorporated to effectively improve the miscibility between oil and water. The added ultrasonic vibration module also has a vibration function, which, combined with the heating plate, makes the simulated oil-water mixing environment more realistic.

[0022] In order to achieve multi-point inspection, automatic water and oil adding devices are set up, and check valves are added to the liquid outlet ends of the water inlet pipe and the oil inlet pipe to achieve accurate liquid filling. During the inspection process, on the basis of quantitative oil, different amounts of water are automatically added to perform multi-point inspection on the oil-water mixing sensor to be tested.

[0023] To achieve automated batch testing, several standard tanks, cleaning tanks, dehydration tanks, and a robotic arm are incorporated. The standard tanks are equipped with ultrasonic vibration modules, heating devices, temperature sensors, and standard oil-water mixture sensors. The standard oil-water mixture is mixed in appropriate proportions using test tubes and then poured into the standard tanks. During testing, the robotic arm automatically places the oil-water mixture sensor under test into the standard tank for testing. If multi-point testing is required, the robotic arm removes the oil-water mixture sensor from the standard tank and then places it into the cleaning and dehydration tanks for cleaning, dehydration, and drying.

[0024] To sum up, the present invention can adopt a convenient solution to inspect a single oil-water mixing sensor to be detected, and can also perform batch inspection on multiple oil-water mixing sensors to be detected, and can also realize multi-point static inspection and dynamic inspection; in addition, the addition of ultrasonic vibration module, heating plate, and double blades makes the oil-water mixing more uniform and more in line with the real environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is an overall schematic diagram provided for Example 1 of the present invention; Figure 2 This is an explosion diagram provided in Example 1 of the present invention; Figure 3 Schematic diagram of the motor and blades provided in Example 1 of the present invention; Figure 4 This is an overall schematic diagram provided for Example 2 of the present invention; Figure 5 A top view of embodiment 2 of the present invention; Figure 6 A schematic diagram of the explosion of the main tank provided in Example 2 of the present invention; Figure 7 A schematic diagram of a pipeline provided in Example 2 of the present invention; Figure 8 This is a cross-sectional view of the main tank body provided in Example 2 of the present invention.

[0027] Among them, the reference numerals in the figures are: 1. Main tank body; 10. Ultrasonic vibration module; 11. Tank cover; 12. Release valve; 13. Drain pipe; 131. Negative pressure valve; 14. Water inlet pipe; 141. Check valve; 15. Oil inlet pipe; 16. Standard oil-water mixture sensor; 17. Oil-water mixture sensor to be tested; 18. Temperature sensor; 19. Heating plate; 2. Digital display device; 3. Speed ​​regulator; 4. Motor; 41. Upper stirring blade; 42. Lower stirring blade; 5. Terminal; 6. Base; 61. Back panel; 7. Control cabinet; 71. Touch screen; 81. Cleaning tank body; 811. Nozzle; 812. Drain valve; 82. Dehydration tank body; 821. Gas nozzle; 83. Standard tank body; 9. Manipulator; 91. Lifting rod; 92. Rocker arm.

[0028] The above drawings illustrate specific embodiments of the present invention, which will be described in more detail below. These drawings and the accompanying description are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] To make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0031] Example 1 See also Figure 1-Figure 3 As shown, this embodiment includes a main tank body 1, a stirring device, a heating device, a standard oil-water mixture sensor 16, and a wiring control module. A tank cover 11 is mounted on the main tank body 1. The standard oil-water mixture sensor 16 is mounted on the tank cover 11 and measures the liquid within the main tank body 1. The stirring device, heating device, and standard oil-water mixture sensor 16 are electrically connected to the wiring control module. The tank cover 11 is also provided with a through hole for receiving a sensor 17 for detecting oil-water mixture. The stirring device thoroughly stirs the oil-water mixture, and the heating device heats the oil-water mixture, simulating the operating temperature of the sensor 17 and ensuring rapid and thorough mixing of the oil and water.

[0032] To facilitate mobility and enable on-site inspection, the calibration device also includes a base 6 and a back plate 61. The back plate 61 and the main tank body 1 are fixedly mounted on the base 6. The wiring control module includes a digital display device 2, a terminal 5, and a speed regulator 3. The stirring device includes a motor 4 and a paddle. The motor 4 is connected to the speed regulator 3 via the terminal 5. The standard oil-water mixture sensor 16 and the oil-water mixture sensor to be tested 17 are electrically connected to the digital display device 2 via the terminal 5, thereby enabling simplified and convenient inspection of the oil-water mixture sensor to be tested 17. An ultrasonic vibration module 10 is installed in the main tank body 1. The ultrasonic vibration module 10 converts the sound energy of the high-power ultrasonic frequency source into mechanical vibrations, and utilizes the cavitation effect generated by ultrasonic waves to destroy tiny bubbles in the liquid. When these bubbles burst, shock waves are generated, which help break up large oil droplets and evenly distribute them in the water. The ultrasonic vibration module 10 also simulates the vibration of the equipment, making it more suitable for actual use.

[0033] like Figure 3As shown, the paddle blades include an upper stirring blade 41 and a lower stirring blade 42, and the upper stirring blade 41 and the lower stirring blade 42 are relatively installed to push and stir the liquid relative to each other, effectively squeezing the oil suspended on the surface of the liquid to the bottom of the main tank body 1, and achieving full mixing of oil and water. A release valve 12 is provided on the bottom edge of the main tank body 1 to facilitate the cleaning and discharge of the main tank body 1. The heating device is a heating plate 19. In this example, the heating plate 19 adopts a power-adjustable resistance wire heating plate, which is installed at the bottom of the main tank body 1, and a temperature sensor 18 for measuring the liquid is installed in the tank body to achieve fitting of the temperature of the oil-water mixture, ensuring that the inspection is more scientific and accurate.

[0034] This technical solution is primarily used on-site to test individual oil-water sensors. When in use, remove the oil-water sensor from the equipment, clean it, and set it aside to dry. Next, use a test tube to mix a certain ratio of oil and water and pour it into the main tank 1. Securely mount the dried oil-water sensor 17 to be tested on the tank lid 11. Then, connect the oil-water sensor 17, the standard oil-water sensor 16, the heating plate 19, the temperature sensor 18, the motor 4, and the ultrasonic vibration module 10 to the terminal 5, and power on the system.

[0035] Adjust the voltage adjustment knob of the speed regulator 3 to adjust the speed of the motor 4. The motor 4 drives the stirring blade to rotate to mix the oil and water. The oil-water mixture sensor 17 to be tested, the standard oil-water mixture sensor 16, the heating plate 19, the temperature sensor 18, and the ultrasonic vibration module 10 work simultaneously. When the digital display device 2 shows that the data of the standard oil-water mixture sensor 16 is consistent with the oil-water mixture, check the data of the oil-water mixture sensor 17 to be tested to determine whether the oil-water mixture sensor 17 to be tested is qualified.

[0036] After the calibration is completed, the liquid in the main tank body 1 is emptied through the release valve 12 provided at the bottom edge of the main tank body 1 and the main tank body 1 is cleaned.

[0037] Example 2 like Figure 4-Figure 8 As shown, based on Example 1, the release valve 12 is replaced with a drain pipe 13. Drain pipe 13 is located at the bottom of the main tank 1. A negative pressure valve 131 is installed at one end of drain pipe 13. The valve of negative pressure valve 131 is flush with the bottom surface of the main tank 1, without any depression, preventing liquid from being retained, thereby improving inspection accuracy. Drain pipe 13 is connected to a liquid discharge pump to effectively ensure that the main tank 1 is emptied.

[0038] The manual liquid dispensing in Example 1 is replaced with automatic liquid dispensing. The main tank body 1 is provided with a water inlet pipe 14 and an oil inlet pipe 15. The water inlet pipe 14 is connected to a pump body with a flow meter, and the water outlet end of the water inlet pipe 14 is located at the upper part of the main tank body 1. A check valve 141 is also installed at the water outlet end, achieving automatic and precise liquid filling. The oil inlet pipe 15 is connected to a pump body with a flow meter, and the oil outlet end of the oil inlet pipe 15 is located at the upper part of the main tank body 1. A check valve 141 is also installed at the oil outlet end.

[0039] like Figure 4 、 5 As shown, in order to achieve rapid and batch inspection, the main tank body 1 is installed on the base 6, and the base 6 is also equipped with a cleaning tank body 81, a dehydration tank body 82, a standard tank body 83, a manipulator 9 and a control cabinet 7. The wiring control module is installed in the control cabinet 7, and the control cabinet 7 is also provided with a touch screen 71. The control cabinet 7 is electrically connected to each electronic module through a PLC. The cleaning tank body 81, the dehydration tank body 82, the standard tank body 83, and the main tank body 1 are installed in a ring around the manipulator 9. The cleaning tank body 81 is provided with a number of nozzles 811 and an ultrasonic vibration module 10. The nozzles 811 and the ultrasonic vibration module 10 are used to clean the oil-water mixture sensor 17 to be detected. A drain valve 812 is provided at the bottom of the cleaning tank body 81 to facilitate drainage. A gas nozzle 821 is installed in the dehydration tank body 82 to blow dry the oil-water mixture sensor 17 to be detected. The cleaned oil-water mixture sensor 17 to be detected is blown dry to ensure that there is no residue and the inspection is more accurate. The standard tank 83 also houses an ultrasonic vibration module 10, a heating plate 19, a temperature sensor 18, and a standard oil-water mixture sensor 16. Two or more standard tanks 83 are installed. Standard oil and water are mixed in appropriate proportions using test tubes and then poured into the standard tank 83. A manipulator 9 uses a lifting rod 91, a rocker arm 92, and a suction nozzle at the end of the rocker arm 92 to move the oil-water mixture sensor 17 to be tested. The stirring device within the main tank 1 includes the ultrasonic vibration module 10. The suction nozzle at the end of the rocker arm 92 can be a magnet or a vacuum nozzle.

[0040] The present invention also provides a calibration method for an oil-water mixing sensor, comprising the following steps: Step S1: Add appropriate amount of oil and water into the main tank 1; Step S2: placing the oil-water mixture sensor 17 to be detected into the main tank 1; Step S3: Connect the standard oil-water mixture sensor 16, the oil-water mixture sensor to be tested 17, the heating device, and the motor 4 to the terminal 5; Step S4: Turn on the power switch of the speed regulator 3 and the switch of the heating device, adjust the voltage adjustment knob of the speed regulator 3, adjust the speed of the motor 4, and the motor 4 drives the stirring blade to rotate to mix the oil and water; Step S5: When the digital display device 2 shows that the data of the standard oil-water mixture sensor 16 is consistent with the oil-water mixture, the data of the oil-water mixture sensor 17 to be tested is checked to determine whether the oil-water mixture sensor 17 to be tested is qualified.

[0041] In step S1 , oil and water are automatically added through the pump body, and the water content of the mixed liquid is gradually increased, and the oil-water mixture sensor 17 to be detected is subjected to multi-point calibration or multi-point detection.

[0042] In step S2, the oil-water mixture sensor 17 to be detected is clamped by the manipulator 9, and the manipulator 9 places the oil-water mixture sensor 17 to be detected into the standard tank body 83 for multi-point calibration or multi-point detection. Before the oil-water mixture sensor 17 to be detected is placed into the standard tank body 83, it needs to be placed in the cleaning tank body 81 for cleaning, and then placed in the dehydration tank body 82 for dehydration and drying.

[0043] In order to have a more thorough and comprehensive understanding of the disclosed content of this embodiment, the principle thereof will be further explained below in conjunction with the usage method.

[0044] Dynamic inspection: One or more oil-water mixture sensors 17 to be tested are clamped by the manipulator 9 and placed in the main tank body 1. Clean water is gradually added to the main tank body 1 according to specific proportions, such as 0%, 1%, 2%, 5%, etc., to prepare an oil-water mixture for testing the response values ​​at different concentrations.

[0045] The specific working steps are as follows: click "Dynamic Inspection Mode" on the touch screen 71 of the control cabinet 7, and the rocker arm 92 of the manipulator 9 will rotate to the loading area. The staff will place the oil-water mixture sensor 17 to be detected on the suction cup of the rocker arm 92, and insert the sensor plug into the socket of the control cabinet 7, and click the assembly completion confirmation button on the touch screen 71. If the oil-water mixture sensor 17 to be detected is newly produced, the cleaning step and the dehydration step can be skipped at this time; if the oil-water mixture sensor 17 to be detected has just been removed from the equipment, the rocker arm 92 will first rotate to the top of the cleaning tank 81, and then descend to place the oil-water mixture sensor 17 to be detected into the cleaning tank 81. At this time, the nozzle 811 sprays clean water to clean the oil-water mixture sensor 17 to be detected, and the ultrasonic vibration module 10 in the cleaning tank 81 is also started to improve the cleaning effect. For environmental protection, the drain valve 812 at the bottom of the cleaning tank 81 can be connected to an oil-water separator to separate the oil and water and reuse them.

[0046] After cleaning is completed, the rocker arm 92 rises and rotates to the top of the dehydration tank 82, and then descends to place the oil-water mixture sensor 17 to be detected into the dehydration tank 82. At this time, the gas nozzle 821 inside the dehydration tank 82 blows and dries the oil-water mixture sensor 17 to be detected.

[0047] After dehydration is completed, the rocker arm 92 sends the oil-water mixture sensor 17 to be detected into the main tank body 1. At this time, the oil inlet pipe 15 adds pure oil into the main tank body 1. The oil-water mixture sensor 17 to be detected and the standard oil-water mixture sensor 16 detect the moisture content of the liquid in the main tank body 1 in real time. Then the water inlet pipe 14 gradually fills with water to realize dynamic input, and the motor 4 starts to stir the liquid, the ultrasonic vibration module 10 starts, and the heating plate 19 starts to measure the values ​​of different temperatures and different water contents in turn. If the value of the standard oil-water mixture sensor 16 is not equal to the value of the input amount, it is necessary to check whether there is a problem with the water inlet pipe 14 and the oil inlet pipe 15, or replace the standard oil-water mixture sensor 16.

[0048] When the value measured by the standard oil-water mixture sensor 16 is consistent with the input value, the value of the oil-water mixture sensor to be tested 17 can be checked to determine whether the oil-water mixture sensor to be tested 17 is normal.

[0049] Static inspection: One or more oil-water mixture sensors 17 to be tested are clamped by the manipulator 9 and placed in standard tanks 83 with different water contents in turn for multi-point calibration or multi-point static testing. Different mixed liquids are gradually configured according to specific proportions, such as 0%, 1%, 2%, 5%, etc.

[0050] The specific working steps are as follows: first, different standard tanks 83 are filled with mixed liquids with different water contents. The oil and water are weighed on a high-precision balance to ensure the accuracy of the mixing ratio. Then, the ultrasonic vibration module 10 and heating plate 19 of the standard tank 83 are turned on. On the touch screen 71 of the control cabinet 7, the static inspection mode is clicked. The rocker arm 92 of the manipulator 9 moves to the loading area. The staff then places the oil-water mixture sensor 17 to be tested on the suction cup of the rocker arm 92 and inserts the sensor's plug into the socket of the control cabinet 7. The staff then clicks the "Assembly Complete" button on the touch screen 71.

[0051] The rocker arm 92 first rotates to the top of the cleaning tank 81, then descends, and the oil-water sensor 17 to be detected is placed in the cleaning tank 81. At this time, the nozzle 811 sprays clean water to clean the oil-water sensor 17 to be detected, and the ultrasonic vibration module 10 in the cleaning tank 81 is also started to improve the cleaning effect.

[0052] After cleaning is completed, the rocker arm 92 rises and rotates to the top of the dehydration tank 82, and then descends to place the oil-water mixture sensor 17 to be detected into the dehydration tank 82. At this time, the gas nozzle 821 inside the dehydration tank 82 blows and dries the oil-water mixture sensor 17 to be detected.

[0053] After dehydration is completed, the rocker arm 92 sends the oil-water mixture sensor 17 to be tested to the standard tank body 83 with a water content of 0%. After the inspection is completed, the manipulator 9 puts the oil-water mixture sensor 17 to be tested back into the cleaning tank body 81 for cleaning, puts it into the dehydration tank body 82 for dehydration, and then puts it into the standard tank body 83 with a water content of 1%... The oil-water mixture sensor 17 to be tested is measured for multiple times with different water contents, and the control cabinet 7 records the measurement data in real time.

[0054] To sum up, the present invention can adopt a convenient solution to test a single oil-water mixture sensor 17 to be tested, and can also perform batch testing on multiple oil-water mixture sensors 17 to be tested, and can also realize multi-point static and dynamic testing; in addition, the addition of ultrasonic vibration module 10, heating plate 19, and double blades makes the oil-water mixing more uniform and more in line with the real environment.

[0055] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the present invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0056] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element centered at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment. The terms "upper end", "lower end", "left side", "right side", "front end", "rear end" and similar expressions used herein are positional relationships with reference to the accompanying drawings.

[0057] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A calibration device for an oil-water mixing sensor, characterized by: The invention comprises a main tank body (1), a stirring device, a heating device, a standard oil-water mixing sensor (16), and a wiring control module. The main tank body (1) is provided with a tank cover (11). The standard oil-water mixing sensor (16) is installed on the tank cover (11) and measures the liquid in the main tank body (1). The stirring device, the heating device, the standard oil-water mixing sensor (16) and the wiring control module are electrically connected. The tank cover (11) is also provided with a through hole for placing the oil-water mixing sensor (17) to be detected.

2. The oil-water mixing sensor calibration device according to claim 1, characterized in that: The device further comprises a base (6) and a back plate (61), wherein the back plate (61) and the main tank body (1) are fixedly mounted on the base (6), the wiring control module comprises a digital display device (2), a terminal (5), and a speed regulator (3), the stirring device comprises a motor (4) and a paddle, the motor (4) is connected to the speed regulator (3) via the terminal (5), and the standard oil-water mixing sensor (16) and the oil-water mixing sensor to be detected (17) are electrically connected to the digital display device (2) via the terminal (5).

3. The oil-water mixing sensor calibration device according to claim 2, characterized in that: The paddle blades include an upper stirring blade (41) and a lower stirring blade (42), and the upper stirring blade (41) and the lower stirring blade (42) are relatively installed to push the liquid relatively to stir it.

4. The oil-water mixing sensor calibration device according to claim 1, characterized in that: A release valve (12) is provided on the bottom edge of the main tank body (1).

5. The oil-water mixing sensor calibration device according to claim 1, characterized in that: The heating device is a heating plate (19) installed at the bottom of the main tank (1), and a temperature sensor (18) for measuring the liquid is installed in the tank.

6. The oil-water mixing sensor calibration device according to claim 1, characterized in that: The main tank body (1) is further provided with a water inlet pipe (14), an oil inlet pipe (15) and a liquid discharge pipe (13); the water inlet pipe (14) is connected to a pump body with a flow meter, and the water outlet end of the water inlet pipe (14) is located at the upper part of the main tank body (1), and a check valve (141) is also installed at the water outlet end; the oil inlet pipe (15) is connected to a pump body with a flow meter, and the oil outlet end of the oil inlet pipe (15) is located at the upper part of the main tank body (1), and a check valve (141) is also installed at the oil outlet end; the liquid discharge pipe (13) is located at the bottom of the main tank body (1), and a negative pressure valve (131) is installed at one end of the liquid discharge pipe (13) located at the main tank body (1).

7. The oil-water mixing sensor calibration device according to claim 1, characterized in that: The main tank body (1) is mounted on a base (6), and a cleaning tank body (81), a dehydration tank body (82), a standard tank body (83), a manipulator (9) and a control cabinet (7) are also mounted on the base (6). The wiring control module is mounted in the control cabinet (7), and the control cabinet (7) is also provided with a touch screen (71); the cleaning tank body (81), the dehydration tank body (82), the standard tank body (83), and the main tank body (1) are mounted in a ring around the manipulator (9), and a plurality of nozzles (811) and an ultrasonic vibration module (10) are provided in the cleaning tank body (81). A drain valve (812) is provided at the bottom of the body (81); a gas nozzle (821) for drying the oil-water mixture sensor (17) to be detected is installed in the dehydration tank (82); an ultrasonic vibration module (10), a heating device, a temperature sensor (18) and a standard oil-water mixture sensor (16) are installed in the standard tank (83); the manipulator (9) moves the oil-water mixture sensor (17) to be detected through the lifting rod (91), the rocker arm (92) and the suction nozzle at the end of the rocker arm (92); and the stirring device in the main tank (1) includes an ultrasonic vibration module (10).

8. A method for calibrating an oil-water mixing sensor, characterized by: The following steps are involved: Step S1: Add appropriate amount of oil and water into the main tank (1); Step S2: placing the oil-water mixture sensor (17) to be detected into the main tank (1); Step S3: Connect the standard oil-water mixture sensor (16), the oil-water mixture sensor to be tested (17), the heating device, and the motor (4) to the terminal (5); Step S4: Turn on the power switch of the speed regulator (3) and the switch of the heating device, adjust the voltage adjustment knob of the speed regulator (3), adjust the speed of the motor (4), and the motor (4) drives the stirring blade to rotate to mix the oil and water; Step S5: When the digital display device (2) displays the data of the standard oil-water mixture sensor (16) as being consistent with the oil-water mixture, the data of the oil-water mixture sensor (17) to be tested is checked to determine whether the oil-water mixture sensor (17) to be tested is qualified.

9. The method for calibrating an oil-water mixing sensor according to claim 8, characterized in that: In step S1, oil and water are automatically added through the pump body, and the water content of the mixed liquid is gradually increased, and a multi-point dynamic calibration or multi-point detection is performed on the oil-water mixed sensor (17) to be detected.

10. The method for calibrating an oil-water mixing sensor according to claim 8, characterized in that: In step S2, the oil-water mixture sensor (17) to be detected is clamped by the manipulator (9), and the manipulator (9) places the oil-water mixture sensor (17) to be detected into the standard tank (83) for multi-point calibration or multi-point static detection. Before each time the oil-water mixture sensor (17) to be detected is placed into the standard tank (83), it is necessary to first place it into the cleaning tank (81) for cleaning, and then place it into the dehydration tank (82) for dehydration and drying.

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