CN117623478A - Rapid rainwater pH value adjusting device for rain test room and use method thereof - Google Patents

Abstract

The invention discloses a rapid preparation device for rainwater pH in a rain test room and a method of using the device, which includes a stirring tank; two storage bins, the two storage bins being symmetrically arranged on the outer peripheral side of the stirring tank for placing acidic preparation liquid Or alkaline prepared liquid; a liquid pump, the liquid outlet end of the placement chamber is connected to the stirring kettle through a liquid pump, used to control the liquid outlet speed of the prepared liquid; a PH sensor, the PH sensor is arranged in the stirring kettle; a processor , the processor is set on the outer peripheral side of the mixing tank; the device can monitor the pH value in real time and automatically adjust the operation of the liquid pump to quickly control the pH value close to the target value, which can realize the function of rapid deployment and reduce the cost of the rain room experiment. operating difficulty.

Description

A device for rapidly adjusting the acidity and alkalinity of rainwater in a rain test room and its use method

Technical field

The invention relates to a device for quickly adjusting the pH of rainwater in a rain test room and its use method.

Background technique

The rain test chamber has always been one of the important tools to evaluate the performance of products under various harsh climatic conditions. These test chambers are often used to simulate rainfall and acid rain conditions in natural environments to evaluate product durability and performance under long-term exposure. However, there are some challenges in the preparation and experiment of rainwater pH in traditional rain test chambers, which may affect the accuracy and repeatability of experimental results.

Traditional rain test rooms usually rely on manual operation or slow automation systems to achieve the pH adjustment of rainwater. These methods may require a lot of time and labor, and may result in slower experimental response times, which cannot fully meet the needs of rapid experiments. In addition, manual operation can easily introduce human errors, reducing the credibility of test results.

Therefore, in order to overcome the problems existing in the traditional rain test room and improve the practicality and response speed of the experiment, we proposed an innovative rainwater pH rapid deployment device and its use method in the rain test room.

Contents of the invention

The object of the present invention is to provide a device for quickly adjusting the pH of rainwater in a rain test room and a method of using the device to solve the problems raised in the above background technology.

In order to solve the above technical problems, the present invention provides the following technical solutions: including,

Stirring kettle;

Two placement bins, the two placement bins are symmetrically arranged on the outer peripheral side of the stirring tank and are used to place acidic compounding liquid or alkaline compounding liquid;

Liquid pump, the liquid outlet end of the placement chamber is connected to the stirring tank through the liquid pump, and is used to control the liquid outlet speed of the prepared liquid;

PH sensor, the PH sensor is arranged in the stirring tank;

Processor, the processor is arranged on the outer peripheral side of the stirring tank.

Preferably, the liquid inlet end of the stirring tank is connected to an external liquid supply device through a metering valve.

Preferably, the pH sensor is connected to the processor through a data line, and the processor is connected to the liquid pump through a data line.

A method of using a device for quickly adjusting the pH of rainwater in a rain test room, including the following steps:

Step A. Add neutral water to the stirring tank, set the preset pH on the processor as required, and determine the error between the current pH value and the target pH value. If it is a negative number, go to step C. If it is a positive number, go to step C. D;

Step B. Calculate the liquid pump control output:

Control output = Kp * Error + Ki * ∫(Error dt) + Kd * d(Error)/dt;

Among them: Kp: proportional gain, controlling the weight of the proportional part;

Error: The error between the current pH value and the target pH value, Error = pH_target - pH_current;

Ki: integral gain, controls the weight of the integral part;

∫(Error dt): The integral of the error, indicating the accumulation of errors over time;

Kd: Differential gain, controls the weight of the differential part.

d(Error)/dt: The derivative of the error, indicating the rate of change of the error with time;

Step C. According to the real-time data transmitted by the PH sensor, control the liquid pump discharge speed through the control output value calculated in step B, add the alkaline adjuster to the stirring kettle, and stir continuously with the help of the stirring kettle until the preform is made. Set the pH value of the solution;

Step D. According to the real-time data transmitted by the PH sensor, control the liquid pump discharge speed through the control output value calculated in step B, add the acidic regulator to the stirring tank, and stir continuously with the help of the stirring tank until the preset pH solution;

Step E. Transport the prepared solution to the rain test room.

Preferably, the alkaline adjuster and acid adjuster in step C and step D are sodium hydroxide solution and hydrochloric acid solution respectively.

Preferably, the KP proportional gain range is 1-10, the KI integral gain range is 0.01-1, and the KD differential gain range is 0-1.

Preferably, the pH sensor 3 feeds back data to the processor 4 in real time, and the processor 4 calculates and adjusts the control output of the liquid pump 6 in real time.

Compared with the prior art, the beneficial effects of the present invention are:

1. Quickly prepare the pH: This device allows the rapid preparation of the pH of neutral water to prepare a solution with a predetermined pH value. This is useful for liquids that require a specific pH in applications such as rain test chambers.

2. Automatic control: The device can monitor the pH value in real time and automatically adjust the operation of the liquid pump to quickly control the pH value close to the target value. This increases the precision and automation of deployment.

3. Real-time feedback: The device obtains pH data in real time through the pH sensor, and then uses an algorithm to calculate the control output, which makes the control process more flexible and accurate.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

Figure 2 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

Figure 3 is an overall system block diagram of an embodiment of the present invention;

Figure 4 is a block diagram of a rapid deployment system according to an embodiment of the present invention.

In the picture: 1. Stirring kettle; 2. Storage bin; 3. PH sensor; 4. Processor; 5. Metering valve.

Detailed ways

In order to solve the existing problem of being unable to quickly and accurately adjust the pH value, the present invention provides a device for quickly adjusting the pH value of rainwater in a rain test room and a method of using the device. The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Obviously, the described inventions are only part of the present invention, rather than the entire invention. Based on the inventions in the present invention, all other inventions obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

Please refer to Figures 1-2. The present invention provides a device for quickly adjusting the pH of rainwater in a rain test room, including:

Stirring kettle 1;

Two placement chambers 2, the two placement chambers 2 are symmetrically arranged on the outer peripheral side of the stirring tank 1, and are used to place acidic compounding liquid or alkaline compounding liquid;

Liquid pump 6, the liquid outlet end of the placement chamber 2 is connected to the stirring tank 1 through the liquid pump 6, used to control the liquid outlet speed of the prepared liquid;

PH sensor 3, the PH sensor 3 is arranged in the stirring tank 1;

Processor 4, the processor 4 is arranged on the outer peripheral side of the stirring tank 1.

Specifically, the liquid inlet end of the stirring tank 1 is connected to an external liquid supply device through a metering valve 5; the metering valve 5 is used to accurately control the amount of liquid entering the stirring tank 1.

Specifically, the PH sensor 3 is connected to the processor 4 through a data line, and the processor 4 is connected to the liquid pump 6 through a data line; the PH sensor 3 feeds back data to the processor 4 in real time, and controls the liquid pump with the help of the processor 4 6 Let it achieve precise dispensing.

Please refer to Figure 3-4, a method of using a rapid pH adjustment device for rainwater in a rain test room, including the following steps:

Step A. Add neutral water to the mixing tank 1, set the preset pH on the processor 4 as required, and determine the error between the current pH value and the target pH value. If it is a negative number, perform step C. If it is a positive number, Execute step D;

Step B. Calculate the control output of liquid pump 6:

Control output = Kp * Error + Ki * ∫(Error dt) + Kd * d(Error)/dt;

Among them: Kp: proportional gain, controlling the weight of the proportional part;

Error: The error between the current pH value and the target pH value, Error = pH_target - pH_current;

Ki: integral gain, controls the weight of the integral part;

∫(Error dt): The integral of the error, indicating the accumulation of errors over time;

Kd: Differential gain, controls the weight of the differential part.

d(Error)/dt: The derivative of the error, indicating the rate of change of the error with time;

Step C. According to the real-time data transmitted by the PH sensor 3, control the liquid discharge speed of the liquid pump 6 through the control output value calculated in step B, add the alkaline adjuster to the stirring tank 1, and continuously stir with the help of the stirring tank 1. Until a solution with a preset pH value is made;

Step D. According to the real-time data transmitted by the pH sensor 3, control the liquid discharge speed of the liquid pump 6 through the control output value calculated in step B, add the acidic regulator to the stirring tank 1, and stir continuously with the help of the stirring tank 1 until Make a solution with a preset pH value;

Step E. Transport the prepared solution to the rain test room.

Specifically, the alkaline adjuster and the acidic adjuster in steps C and D are sodium hydroxide solution and hydrochloric acid solution respectively; it is convenient to adjust the pH value within a certain range with the help of its own acidity and alkalinity.

Specifically, the KP proportional gain range is 1-10, the KI integral gain range is 0.01-1, and the KD differential gain range is 0-1; the specific data derivation process:

a. Set Kp: Start from 1 and gradually increase Kp until the system begins to oscillate or overshoot. Once oscillation occurs, reduce the Kp value to stabilize the system;

b. Set Ki: Set Ki to zero, and then gradually increase it to reduce the steady-state error, and the numerical team is small. Excessive Ki value may lead to integral saturation and instability;

c. Set Kd: Set Kd to zero and then gradually increase it to suppress rapidly changing errors. Kd can help the system converge faster and reduce overshoot;

d. Repeated iteration: Repeatedly try different Kp, Ki, Kd values until the required control performance is achieved.

Specifically, the pH sensor 3 feeds back data to the processor 4 in real time, and the processor 4 calculates and adjusts the control output of the liquid pump 6 in real time; the pH sensor 3 feeds back data in real time to provide calculation data to the processor 4 .

The present invention provides a device for rapidly adjusting the pH of rainwater in a rain test room and its use method, which has the following advantages:

1. Quickly prepare the pH: This device allows the rapid preparation of the pH of neutral water to prepare a solution with a predetermined pH value. This is useful for liquids that require a specific pH in applications such as rain test chambers.

2. Automatic control: The device can monitor the pH value in real time and automatically adjust the operation of the liquid pump 6 to quickly control the pH value close to the target value. This increases the precision and automation of deployment.

3. Real-time feedback: The device obtains pH data in real time through the pH sensor, and then uses an algorithm to calculate the control output, which makes the control process more flexible and precise.

Although the invention of the present invention has been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these inventions without departing from the principles and spirit of the invention. , the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A device for quickly adjusting the pH of rainwater in a rain test room, which is characterized by: including, Stirring kettle (1); Two placement bins (2), the two placement bins (2) are symmetrically arranged on the outer peripheral side of the stirring tank (1), and are used to place acidic compounding liquid or alkaline compounding liquid; Liquid pump (6), the liquid outlet end of the placement chamber (2) is connected to the stirring tank (1) through the liquid pump (6), and is used to control the liquid outlet speed of the prepared liquid; PH sensor (3), the PH sensor (3) is arranged in the stirring tank (1); Processor (4), the processor (4) is arranged on the outer peripheral side of the stirring tank (1). 2. A device for quickly adjusting the pH of rainwater in a rain test room according to claim 1, characterized in that: the liquid inlet end of the stirring tank (1) is connected to an external liquid supply device through a metering valve (5). 3. A device for quickly adjusting the pH of rainwater in a rain test room according to claim 1, characterized in that: the pH sensor (3) is connected to the processor (4) through a data line, and the processor (4) Connected to the liquid pump (6) via data cable. 4. A method of using a rainwater pH rapid preparation device in a rain test room according to any one of claims 1 to 3, which is characterized in that it includes the following steps: Step (A): Add neutral water to the stirring tank (1), set the preset pH on the processor (4) as required, and determine the error between the current pH value and the target pH value. If it is a negative number, perform the steps C, if it is a positive number, perform step D; Step (B), calculate the control output of the liquid pump (6): Control output = Kp * Error + Ki * ∫(Error dt) + Kd * d(Error)/dt; Among them: Kp: proportional gain, controlling the weight of the proportional part; Error: The error between the current pH value and the target pH value, Error = pH_target - pH_current; Ki: integral gain, controls the weight of the integral part; ∫(Error dt): The integral of the error, indicating the accumulation of errors over time; Kd: Differential gain, controls the weight of the differential part; d(Error)/dt: The derivative of the error, indicating the rate of change of the error with time; Step (C), according to the real-time data transmitted by the pH sensor (3), control the liquid discharge speed of the liquid pump (6) through the control output value calculated in step B, and add the alkaline adjuster into the stirring tank (1). And stir continuously with the help of the stirring tank (1) until the solution with the preset pH value is made; Step (D), according to the real-time data transmitted by the pH sensor (3), control the liquid discharge speed of the liquid pump (6) through the control output value calculated in step B, add the acidic regulator to the stirring tank (1), and Stir continuously with the help of the stirring kettle (1) until a solution with a preset pH value is obtained; Step (E), transport the prepared solution to the rain test room. 5. A method of using a rapid pH adjustment device for rainwater in a rain test room according to claim 4, characterized in that: the alkaline adjuster and the acidic adjuster in the steps (C) and (D) are respectively For sodium hydroxide solution and hydrochloric acid solution. 6. A method of using a rainwater pH rapid preparation device in a rain test room according to claim 4, characterized in that: the KP (proportional gain) range is 1-10, and the KI (integral gain) range is 0.01- 1. KD (differential gain) range is 0-1. 7. A method of using a rainwater pH rapid preparation device in a rain test room according to claim 4, characterized in that: the pH sensor (3) feeds back data to the processor (4) in real time, and the processor (4) 4) Real-time calculation and adjustment of liquid pump (6) control output.